A 50-N force is the only force on a 2-kg crate that starts from rest. Consider the instant the object has gone 2 m. What is the rate at which the force is doing work? O 250 W O 100 W O 2.5 W O 25 W O 75 W

A 50-N force is the only force on a 2-kg crate that starts from rest. Consider the instant the object has gone 2 m. What is the rate at which the force is doing work? O 250 W O 100 W O 2.5 W O 25 W O 75 W

Name: 33 A 50-N force is the only force on a 2-kg crate that starts from res
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: 33 A 50-N force is the only force on a 2-kg crate that starts from rest. Consider theinstant the object has gone 2 m. What is the rate at which the force is doingwork?O 250 WO 100 WO 2.5 WO 25 WO 75 W

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 2CQ: Give an example of a situation in which there is a force and a displacement, but the force does no...

See similar textbooks

Similar questions

. A compact car can climb a hill in 10 s. The top of the hill is 30 in higher than the bottom, and the car’s mass is 1,000 kg. What is the power output of the car?
A student expends 7.5 W of power in lifting a textbook 0.50 m in 1.0 s with a constant velocity. (a) How much work is done, and (b) how much does the book weigh (in newtons)? The answers to Confidence Exercises may be found at the back of the book.
What is the dominant factor that affects the speed of an object that started from rest down a frictionless incline if the only work done on the object is from gravitational forces?
A 300 g hockey puck is shot across an ice-covered pond. Before the hockey puck was hit, the puck was at rest. After the hit, the puck has a speed of 40 m/s. The puck comes to rest after going a distance of 30 m. (a) Describe how the energy of the puck changes over time, giving the numerical values of any work or energy involved. (b) Find the magnitude of the net friction force.
The surface of the preceding problem is modified so that the coefficient of kinetic friction is decreased. The same horizontal force is applied to the crate, and after being pushed 8.0 m, its speed is 5.0 m/s. How much work is now done by the force of friction? Assume that the crate starts at rest.
Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
Work is equal to the force times the ___ distance through which the force acts. (4.1)
A sled of mass 70 kg starts from rest and slides down a 10 incline 80 m long. It then travels for 20 m horizontally before starting back up an 8° incline. It travels 80 m along this incline before coming to rest. What is the magnitude of the net work done on the sled by friction?
A worker pushes a wheelbarrow with a horizontal force of 50 N on level ground over a distance of 5.0 m. 11 a friction force of 43 N acts on the wheelbarrow in a direction opposite that of the worker, what work is done on the wheelbarrow by the worker? (a) 250 J (b) 215 (c) 35 J (d) 10 J (e) None of those answers is correct.
An 8.0-g bullet has a speed of 800 m/s. (a) What is its kinetic energy? (b) What is its kinetic energy if the speed is halved?
A boy in a wheelchair (total mass 47.0 kg) has speed 1.40 m/s at the crest of a slope 2.60 m high and 12.4 m long. At the bottom of the slope his speed is 6.20 m/s. Assume air resistance and rolling resistance can be modeled as a constant friction force of 41.0 N. Find the work he did in pushing forward on his wheels during the downhill ride.
Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.