17. A child decides to take her cat on a walk, but the cat does not cooperate. The child pulls on the 2.5 kg cat with force of 20 N in a direction that is 30 degrees above horizontal, and the cat resists being pulled forward with a horizontal force of 15 N. How much force is the child pulling with in the horizontal direction (the direction the cat will move)? Your answer: O 10 N O 17 N O 20 N O 600 N

17. A child decides to take her cat on a walk, but the cat does not cooperate. The child pulls on the 2.5 kg cat with force of 20 N in a direction that is 30 degrees above horizontal, and the cat resists being pulled forward with a horizontal force of 15 N. How much force is the child pulling with in the horizontal direction (the direction the cat will move)? Your answer: O 10 N O 17 N O 20 N O 600 N

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 45PQ: One great form of athletic competition for bulldogs, American pit bull terriers, huskies, and many...

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A block of ice (m = 15.0 kg) with an attached rope is at rest on a frictionless surface. You pull the block with a horizontal force of 95.0 N for 1.54 s. a. Determine the magnitude of each force acting on the block of ice while you are pulling. b. With what speed is the ice moving after you are finished pulling? Repeat Problem 71, but this time you pull on the block at an angle of 20.0.
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1. When a 25-kg crate is pushed across a frictionless horizontal floor with a force of 200N, directed 20° below the horizontal, the magnitude of the normal force of the floor on the crate is: 310 N 25 N 250 N 68 N 180 N
17. A child decides to take her cat on a walk, but the cat does not cooperate. The child pulls on the 2.5 kg cat with force of 20 N in a direction that is 30 degrees above horizontal, and the cat resists being pulled forward with a horizontal force of 15 N. How much force is the child pulling with in the horizontal direction (the direction the cat will move)? Your answer: 10 N O 17 N O 20 N O 600 N
4. A 90 kg man stands in an elevator that has a downward acceleration of 1.4 m/s?. The force exerted by him on the floor is about: A Zero B 90 N 880 N D 760 N 5. A student pushes a loaded sled whose mass m is 100 kg for a distance d of 5 m over a frictionless surface. He exerts a constant horizontal force F of 100 N. If the sled starts from rest, what is its acceleration? 20 m/s? 1 m/s? 100 m/s 5 m/s? A B D
The coefficient of static friction between a sled and the snow is 0.19, with a coefficient of dynamic friction of 0.16. A 25-kg girl sits on her sled facing down a 10-degree hill. What is the minimum push her friend needs to exert to start moving down the hill? After getting a push, does she continue to slide down the hill? Explain.