A child is playing with a ball on a level surface. She gives the ball a push to get it rolling, then the ball rolls a short distance before coming to a stop. Which of the following explains why the ball slows to a stop? a. the child stopped pushing it b. the speed is proportional to the force c. there must have been some force on the ball opposing the direction of motion d. the net force on the ball was zero, so it wanted to remain stationary

A child is playing with a ball on a level surface. She gives the ball a push to get it rolling, then the ball rolls a short distance before coming to a stop. Which of the following explains why the ball slows to a stop? a. the child stopped pushing it b. the speed is proportional to the force c. there must have been some force on the ball opposing the direction of motion d. the net force on the ball was zero, so it wanted to remain stationary

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter6: Motion In Two Dimensions

Section: Chapter Questions

Problem 61A

See similar textbooks

Similar questions

A falling object is pulled down by the earth. The earth is pulled up toward the object. Why doesn’t the earth move? a. Only the earth has gravity. b. The Earth has a very large mass and a small acceleration. c. The Earth has a very small mass and a large acceleration. d. Air resistance gets in the way. E. Answer
Two marbles roll off a table top that is 2 meters high. The marbles roll off the table at the same time, but with different speeds. The red marble has a speed of 3 m/s, while the blue marble has a speed of 6 m/s. Which is true? A.The blue marble will strike the ground in less time than the red marble. B.The red marble will strike the ground in less time than the blue marble. C.It is impossible to determine the time the marbles will take to reach the ground unless their mass is known .D.The red and blue marbles will strike the ground at the same time.
A newly discovered planet has twice the mass and three times the radius of the earth. What is the free-fall acceleration at its surface, in terms of the free-fall acceleration g at the surface of the earth? A. 178 B. ½¾3⁄8 C. ³/g D. 8 WIN
Which of the following best describes why objects can move in a circular path? a. The inertia of the objects pushes them along the circular path b. A centripetal force pushes them toward the center of the circular path. c. The momentum of the objects pushes them along the circular path. d. A centrifugal force pushes them along the circular path.
What happens to a car traveling on a spiral path, toward the center, if its speed stays the same the whole time? and why ? a. the acceleration increases b. Its centripetal force gets bigger c.Its centripetal force gets smaller d.Its acceleration decreases
49. A 615-kg racing car completes one lap in 14.3 s around a circular track with a radius of 50.0 m. The car moves at constant speed. a. What is the acceleration of the car? b. What force must the track exert on the tires to produce this acceleration? 50. An athlete whirls in a 7.00-kg hammer tied to the end of a 1.3-m chain in a horizontal circle. The hammer makes one revolution in 1.0 s. a. What is the centripetal acceleration of the hammer? b. What is the tension in the chain?
Missy’s favorite ride at the Topsfield Fair is the rotor. This is a circular ride (with a radius of 4.0m) where people stand up against the wall and it spins around and the floor drops out. The ride takes 2.0s to make one full revolution a. What is providing the centripetal force on Missy? b. What is Missy’s linear velocity? c. What is Missy’s centripetal acceleration on the ride? Show Your Work
What is the acceleration of a 500-kg tricycle moving at 8 m/s takes a turn around a circle with a radius of 20 m? a. 0.4 m/s2 b. 4 m/s2 c. 0.5 m/s2 d. 5 m/s2 Is the answer is in the choices?
LESSON REVIEW A. increasing the mass of the wheelbarrow B. decreasing the mass of the wheelbarrow C. reversing the direction of the wheelbarrow D. changing the color of the wheelbarrow
Which of the following system CAN be used as an inertial reference frame? a. A block rotating about its center of mass b. A box sliding down with a constant velocity c. A car turning in a curved intersection d. A chair on a ferris wheel rotating at a constant rate.
If a 1,000-kg car is traveling at 20.0 m/s when it reaches the bottom of a circular hill of radius 8.00 m, what normal force does the road exert on the car at the bottom of the hill? a. 59,800 N b. 70,000 N c. 19,600 N d. 82,500 N e. 40,000 N
How will the maximum height of a projectile change in a planet where the gravitational acceleration is half that on earth assuming the same initial conditions as on Earth? a. It will be half as high as on Earth. b. It will be as high as on Earth. c. It will be twice as high as on Earth. d. It will be four times as high as on Earth.