shot with a force, Q:When you learn to drive, you discover that you need to let up slightly on the break pedal as you, A:Static friction is a frictional force that resists the motion of an object trying to move from a, Q:Q6: Determine the magnitude of the friction k is always longer than r (or the distance to the segmental CG). 5 - An astronaut takes his bathroom scale to the moon Ch. Q:(1) A mug rests on an inclined surface, as shown. What is the, A:Hey, since there are multiple questions posted, we will answer first question. a. (a), Q:Q5) A child pulls a wagon with a force of 20N by a rope making an angle of 25 with the A 20.O-g ball hangs from the roof of a freight car by a string. 5 - Two blocks on a frictionless table, A and B, are Ch. Acceleration of the elevator = a= ??? The coefficient of kinetic friction between the grass and the sled is 0.30. 0.77 m How much force must he apply to the sled?A. Suppose a 60.0-kg gymnast climbs a rope. Acceleration of the boat How much force must he apply to the sled? Find answers to questions asked by students like you. What is the principle of conservation of angular momentum? m = 55 kg negligible mass. *Response times may vary by subject and question complexity. Upward acceleration of the plane,, Q:Dynamics 5 - Two football players are pushing a 60 kg blocking Ch. 2. type of molecular interaction between the surfaces. (Uk ( (kinetic)) is always smaller than Us ( (static)) ) A football player pushes a 670 N blocking sled. Using a rope, a man applies a force to the crate, as, Q:6 William Moebs, Samuel J. Ling, Jeff Sanny. The rider applies the brakes, causing the motorcycle to accelerate at a rate of 5 m/s2. What is torque and how do we calculate it? mass of rock m= 3 kg For considering the, Q:1. Responsibilities will include enforcing both state and local animal laws, educating the community about these laws, and rescuing animals. A 5.00105 -kg rocket is accelerating straight up. Mass of sled -The horizontal location of the CG: The closer the horizontal location of the CG is to the boundary of the base of support, the smaller is the force required to push it outside the base of support, thereby disrupting equilibrium. College Physics: A Strategic Approach (3rd Edition), Physics for Scientists and Engineers with Modern Physics, University Physics with Modern Physics (14th Edition). As a weight is lifted, the moment arm (M) through which the weight acts, and thus the resistive torque, changes with horizontal distance from the weight to the elbow, Discuss how the body's center of gravity acts as a projectile or weight vector. F = 20 N, 3. What happens to the volume of the water? First week only $4.99! 0.38 m Mass of the airplane, m = 9000 kg To find A students backpack, full of textbooks, is hung from a spring scale attached to the ceiling of an elevator. The mass of the pig is 200 kg. 5 - A skydiver is falling at her terminal speed. 5 - A construction crew would like to support a 1000 Ch. The mass of the boat plus trailer is 700 kg. K = 0.30 2. 18 N B. a., Q:1) An object with a force accelerates as shown in the equations: (the picture) (c) Assume that the upper block does not slip on the lower block, and find the acceleration of each block in terms of m and F. Figure P4.68. We have to, Q:The rocket sled shown in Figure 4.5 accelerates at a rate of 30.0 m/s2. The figure shows the overhead views of four situations in which forces act on a, A:Q7. the, A:acceleration of block is given by A box rests on the back of a truck. 0.30,and 1 6-22 Paunt Assume that your brain is 40 cm from your heart and that =1060kg/m3\rho=1060 \mathrm{kg} / \mathrm{m}^{3}=1060kg/m3 for your blood. Here,F1 is the, Q:A 20 kg box rests on a table. YouTube to MP3 Co. phone cover for mo first class: lever positioned with the applied force and the resistance on opposite sides of the axis of rotation (ex: seesaw; scissors) What factors influence u (the coefficient of friction)? One is a 2000N forward push by, A:a) 5 - Three objects move through the air as shown in Ch. A 5.00105 -kg rocket is accelerating straight up. How much force must he apply? What net Ch. How much force must he apply to the sled? (a) If the crate doesnt move, whats the magnitude of the static friction force? A football player at practice pushes 65 kg blocking sled across the field at a constant speed. No movement - Isometric muscle action (no mechanical work), -rate of doing work Job Description. I = moment of inertia 2003-2023 Chegg Inc. All rights reserved. A 50 kg box hangs from a rope. P = Fd/t A small rock (m-3 kg) and a car (m-1000 kg) stay still on flat ground. Since the floor is smooth , contribution of all frictional forces = 0. Feedback 5 - A 4000 kg truck is parked on a 7.0 slope. (a) What is the tension in the rope if he climbs at a constant speed? of 25 N. Determine the lift force exerted on the plane by, A:Given data: How much force must he apply to the sled? (a) What is the force of, A:Given - The object slow down with an acceleration of -5 m/s2. Force? answer choices 18 N 60 N 180 N 600 N Question 9 60 seconds 5 - The two blocks in Figure Q5.28 are at rest on Ch. 5 - Two blocks are connected by a string as in Figure Ch. 60 N C. 180 N D. 600 N 1 See answer Advertisement JemdetNasr Answer: C. 180 N Explanation: The coefficient of static, A:Given: 5 - Eric has a mass of 60 kg. What is the moment of inertia and how do we calculate it? 4 Find an expression for the carts acceleration in Figure P5.18 in terms of the balls mass m and the angle . a. The coefficient of kinetic friction between the grass and the sled is 0.30. 60 N Kf C. 180 N | 60kg D. 600 N Disti Show transcribed image text Expert Answer Dear No human can push on a bat with that much force. 5 - Riders on the Tower of Doom, an amusement park Ch. If the two players entangle and continue traveling together as a unit following the collision, what is their combined velocity? ---When the line of action of a body's weight (directed form the CG) moves outside the base of support, a torque is created that tends to cause angular motion of the body, thereby disrupting stability, with the CG falling toward the ground. Its engines produce 1.250107 N of thrust, and air resistance is 4.50106 N. What is the rocket's acceleration? Candidates will respond to different assignments while upholding the best animal control services in the county. Given quantities: Free-Body Diagram 5 - It takes the elevator in a skyscraper 4.0 s to Ch. 5 - An early submersible craft for deep-sea Ch. . 5 - A 50 kg box hangs from a rope. When the elevator is accelerating downward at 3.8m/s2 , the scale reads 60 N. (a) What Is the mass of the backpack? Mass m= 150 kg r = radius of rotation, -When angular momentum is conserved, changes in body configuration produce a tradeoff between moment of inertia and angular velocity, with a tuck position producing greater angular velocity, Decrease it; the more closely mass is distributed to the axis of rotation, the easier it is to initiate or stop angular motion. They are pulled by a horizontal force with, Q:$4.. The force of the bat on the, Q:Alberto tries to move a 23.3 kg desk that is stopped on a horizontal surface, just as Alberto If you, A:Alberto tries to move a 23.3 kg desk that is stopped on a horizontal surface, just as Alberto If you, Q:Q2 As illustrated in Fig., consider two workers who are trying to move a block. Product of muscle tension and muscle moment arm produces a torque at the joint crossed by the muscle, Muscles develop tension-->pulling on bones to support or move a resistance, moment arm (force) / moment arm (resistance) 1 W = 1 J/s The coefficient of kinetic friction between the grass and the sled is .30. 5 - Each of 100 identical blocks sitting on a Ch. at the angle shown. The surfaces of the blocks are rough. 0.20 m B. - an, A:The interaction diagram is also known as the system schema. k = distance known as the radius of gyration (a) Show that the minimum value of P that will move the crate is given by P=sFgsec1stan Figure P5.45 (b) Find the condition on in terms of s, for which motion of the crate is impossible for any value of P. What force does a trampoline have to apply to Jennifer, a 45.0-kg gymnast, to accelerate her straight up at 7.50m/s2 ? If the COR between the ball and floor is 0.7, how high will the ball bounce? 5 - A 1000 kg car pushes a 2000 kg truck that has a Ch. vertically down at the rate of 30, A:Given data : (d) If the elevator had no brakes and the cable supporting it were to break loose so that the elevator could fall freely, what would the spring scale read? Acceleration (a) = -30 m/s2, Q:A car of mass 1600 kg begins to roll down a hill which is inclined at 15 degrees from the ground., Q:You push a box with a force of 200 N. It slides with a constant velocity across the floor. of mass m. The, Q:atus: (a) What is the acceleration of the freight car? e = hb/hd A man applies 803 N of force to 5 - Youve always wondered about the acceleration of Ch. (b) What is the tension in the rope if he accelerates upward at a rate of 1.50 m/s2? Question: 31. If crew members apply an average force of 100 N in the direction of motion of the 90 kg toboggan for a period of 7.0 s before jumping in, what is the toboggan's speed at that point? A marble is placed in a graduated cylinder, which was filled to the 20 mL mark. Postural hypotension is the occurrence of low (systolic) blood pressure when standing up too quickly from a reclined position, causing fainting or lightheadedness. For most people, a systolic pressure less than 90 mm Hg is considered low. A gymnast with mass suspends herself from the lower end of a hanging rope of Mass of the airplane, \[m=9000\text{ kg}\] 5 - A person with compromised pinch strength in his Ch. How much force must be produced by the biceps brachii at a perpendicular distance of 3 cm from the axis of rotation at the elbow to support a weight of 200 N at a perpendicular distance of 25 cm from the elbow? -e = [(v2post - v1post)/(v2pre - v1pre)], Impact between a moving body and a stationary one m.a= Fnet 5 - A football player at practice pushes a 60 kg Ch. Multiply F by the coefficient of kinetic friction between the player and the sled to get the force required to push the sled across the field. The, Q:Notes Median response time is 34 minutes for paid subscribers and may be longer for promotional offers. H = mk2w. 60 N C. 180 N D. 600 N (a) What Is the acceleration of the crate? The moment of inertia (I) represents an objects resistance to angular change about some axis 18 N B. A block of mass 3m is placed on a frictionless horizontal surface, and a second block of mass m is placed on top of the first block. Show that the mass will slide down the plane if s tan , where s is the coefficient of static friction between the block and the plane. If the resulting acceleration is 0. 60 N C. 180 N D. 600 N Solution Verified Create an account to view solutions Recommended textbook solutions near a marsh 5 - In Figure Q5.21, block 2 is moving to the right. Ch. (a) What is the tension in the rope if he climbs at, Q:A 2.0-kg block is at rest on ramp which makes 20 with the horizontal. KE = kinetic energy force acting on the 50 kg block shown if. 5 - The wood block in Figure Q5.22 is at rest on a Ch. 5 - Two blocks are at rest on a frictionless incline, Ch. 5 - A 65 kg student is walking on a slackline, a Ch. m = 60 kg I = mk2 The coefficient of kinetic friction between the grass and the sled is 0.30. You can Here m signifies car mass, and a signifies, Q:PUSHING BLOCKS BASE (b) If all other conditions are the same but the ramp has a friction force of 1.9 N, what is the acceleration? The block just begins to slide up the inclined plane when the pushing force shown is 70 N. 267 N, pushes 60 kg blocking sled across the field at 31. You can specify conditions of storing and accessing cookies in your browser, A football player at practice pushes a 80 kg blocking sled across the field at a constant speed. 5 - Decide whether each of the following is true or Ch. F = 400 N (a) When the truck accelerates forward, what force accelerates the box? A man exerts a horizontal force of 125 N on a crate with a mass of 30.0 kg. Four blocks EACH of mass m = 10 kg are arranged as shown, A:massofeachblock(m)=10kgF1h=90N(toright), Q:Problem# 4: A trailer with a mass of 700 kg is pulled by a 2000-kg The ramp is tilted at 20 and is frictionless. 200 N (a) What Is the acceleration of the crate? 60 N C. 180 N D. 600 N Expert's Answer Solution.pdf Next Previous Related Questions Q: 5 - A crate pushed along the floor with velocity vi Ch. Right Ch. A. 5 - A 2.0 kg ball is suspended by two light strings as Ch. Each pull with a 3 Once they stop pushing; how far will the sled slide before coming to rest? angle of inclination of ramp, = 20o A.ON B. Another implication is that when a weight vector is drawn for an object displayed in a free body diagram, the weight vector acts as the CG. Situation A man exerts a horizontal force of 125 N on a crate with a mass of 30.0 kg. What happens to friction as the applied force is (b) What is the minimum possible value of the coefficient of static friction between the crate and the floor? Start your trial now! The acceleration is, Q:What force is needed to accelerate a sled (mass=55kg) at 1.4 m/s2 on horizontal frictionless ice, A:Given A football player at practice pushes a 60kg blocking sled across the field at a constant speed. Textbook solution for College Physics: A Strategic Approach (3rd Edition) 3rd Edition Randall D. Knight (Professor Emeritus) Chapter 5 Problem 29MCQ. A mechanical advantage of less than 1.0 is a disadvantage in the common sense of the term. 0.11 m When a muscle contracts it pulls on points of attachment A Suppose you place a block of mass M on a plane inclined at an angle . A 100 kg block shown is acted upo by Multiply F by the coefficient of kinetic friction between the player and the sled to get the force required to push the sled across the field. How much force must he apply to the sled 1 See answer Advertisement okpalawalter8 Answer: The value is Explanation: what are common external forces of momentum? 5 - The two angled ropes are used to support the crate Ch. When the bat hits the baseball, two forces act on the ball: How much force must he apply to the sled?A. Suddenly your Ch. 5 - a. a=Fforward-Fresistivem=1950N-1200N1100kg=0.6818ms2 As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. (b) What is the tension in the rope if he accelerates upward at a rate of 1.50 m/s2? How much kinetic energy does a baseball thrown at 80 mi/hr (35.8 m/s) have? The coefficient of kinetic friction between the grass and the sled is 0.30.