Homework Answers
Concept - first find the acceleration using Newton’s law of motion and then use equation of kinematics to find the required displacement as shown below,
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ce of 70.0 N, exerted 43.5 degrees above the horizontal, acts on a 30.0-kg now. How...
Chapter 07, Problem 44 GO A 70.0-kg person, running horizontally with a velocity of +2.49 m/s, jumps onto a 19.3-kg sle...
Chapter 07, Problem 44 GO A 70.0-kg person, running horizontally with a velocity of +2.49 m/s, jumps onto a 19.3-kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. (b) The sled and person coast 30.0 m on level snow before coming to rest. What is the coefficient of kinetic friction between the sled and the snow? (a) Number (b) Number Units...
A sled weighing 60.0 N is pulled up a snowy hill inclined at 10 degrees to...
A sled weighing 60.0 N is pulled up a snowy hill inclined at 10 degrees to the horizontal at a constant speed so that the coefficient of kinetic friction between sled and snow is 0.070. A penguin weighing 70.0 N rides on the sled. If the coefficient of static friction between penguin and sled is 0.950, find a). the force of friction between the sled and the snow, b). the force of static friction between the penguin and the sled,...
FP 30.0° ÈN The 10.0-kg box is now pulled along a horizontal surface by a force...
FP 30.0° ÈN The 10.0-kg box is now pulled along a horizontal surface by a force of 40.0 N applied at a 30.0° angle above horizontal. The coefficient of kinetic friction remains at 0.30. Calculate its acceleration. What would be the coefficient of static friction? Ffr mg
A man pulls a 30.0 kg crate across level ground at constant velocity with a light...
A man pulls a 30.0 kg crate across level ground at constant velocity with a light rope that makes an angle of 20.0° above horizontal. The tension in the rope is 40.0 N. What is the coefficient of friction between the sled and the ground? A. 0.161 B. 0.188 C. 0.0441 D. 0.0851 E. 0.134
dragged over a rough, horizontal surface by a 70.0 N force acting at 20.0° above the...
dragged over a rough, horizontal surface by a 70.0 N force acting at 20.0° above the horizontal. The block is displaced s (a) Find the work done on the block by the 70.0 N force. Find the work done on the block by the normal force. (c) Find the work done on the block by the gravitational force. Find the work done on the block by the force of kinetic friction? (e) Find the total change in the block's kinetic...
A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial...
A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 124 m/s from the top of a cliff 144 m above level ground, where the ground is taken to be y = 0. (a) What is the initial total mechanical energy of the projectile? (Give your answer to at least three significant figures.) (b) Suppose the projectile is traveling 87.9 m/s at its maximum height of y = 304 m. How much...
A 44.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial...
A 44.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 128 m/s from the top of a cliff 160 m above level ground, where the ground is taken to be y = 0. (a) What is the initial total mechanical energy of the projectile? (Give your answer to at least three significant figures.) ____J (b) Suppose the projectile is traveling 90.7 m/s at its maximum height of y = 331 m. How...
A dockworker applies a constant horizontal force of 70.0 N to a block of ice on...
A dockworker applies a constant horizontal force of 70.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 15.0 m in 6.00 s. What is the mass of the block of ice? If the worker stops pushing at the end of 6.00 s, how far does the block move in the next 6.00 s?
A horizontal force of 280 N is exerted on a 2.0 kg discus as it is...
A horizontal force of 280 N is exerted on a 2.0 kg discus as it is rotated uniformly in a horizontal circle (at arm's length) of radius 1.00 m. Calculate the speed of the discus. A 56-kg skier starts from rest at the top of a 1200 m long trail which drops a total of 230 m from top to bottom. At the bottom, the skier is moving 11.0m/s. How much energy was dissipated by friction? Use energy methods
A 70.0-kg block is dragged 12.0-m across the room by a horizontal 600-N force. How long...
A 70.0-kg block is dragged 12.0-m across the room by a horizontal 600-N force. How long (time) does it take to get there if the block was initially at rest? The static and kinetic coefficient of friction are mu_s = 0.4, mu_k = 0.3 respectively. Your Answer:
Chapter 07, Problem 44 GO A 70.0-kg person, running horizontally with a velocity of +2.49 m/s, jumps onto a 19.3-kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. (b) The sled and person coast 30.0 m on level snow before coming to rest. What is the coefficient of kinetic friction between the sled and the snow? (a) Number (b) Number Units...
FP 30.0° ÈN The 10.0-kg box is now pulled along a horizontal surface by a force of 40.0 N applied at a 30.0° angle above horizontal. The coefficient of kinetic friction remains at 0.30. Calculate its acceleration. What would be the coefficient of static friction? Ffr mg
dragged over a rough, horizontal surface by a 70.0 N force acting at 20.0° above the horizontal. The block is displaced s (a) Find the work done on the block by the 70.0 N force. Find the work done on the block by the normal force. (c) Find the work done on the block by the gravitational force. Find the work done on the block by the force of kinetic friction? (e) Find the total change in the block's kinetic...
A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 124 m/s from the top of a cliff 144 m above level ground, where the ground is taken to be y = 0. (a) What is the initial total mechanical energy of the projectile? (Give your answer to at least three significant figures.) (b) Suppose the projectile is traveling 87.9 m/s at its maximum height of y = 304 m. How much...
A dockworker applies a constant horizontal force of 70.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 15.0 m in 6.00 s. What is the mass of the block of ice? If the worker stops pushing at the end of 6.00 s, how far does the block move in the next 6.00 s?
A horizontal force of 280 N is exerted on a 2.0 kg discus as it is rotated uniformly in a horizontal circle (at arm's length) of radius 1.00 m. Calculate the speed of the discus. A 56-kg skier starts from rest at the top of a 1200 m long trail which drops a total of 230 m from top to bottom. At the bottom, the skier is moving 11.0m/s. How much energy was dissipated by friction? Use energy methods
A 70.0-kg block is dragged 12.0-m across the room by a horizontal 600-N force. How long (time) does it take to get there if the block was initially at rest? The static and kinetic coefficient of friction are mu_s = 0.4, mu_k = 0.3 respectively. Your Answer:
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