ZuoTi.Pro
Question

A constant 74.6-N force acts on a 4.99-kg box. The box initially is moving at 15.1...

A constant 74.6-N force acts on a 4.99-kg box. The box initially is moving at 15.1 m/s in the direction of the force, and 2.93 s later the box is moving at 76.5 m/s. Determine the work (in J) done by this force. You may assume that the box experiences constant acceleration, but do not assume that only one force acts on the box.

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

The constant force of 74.6 N is the net force acting on the box and the work it does is equal to the change in the kinetic energy of the box.

Using the work-kinetic energy theorem, relate the work done by the constant force to the change in the kinetic energy of the box:

W = KEf - KEi

W = (1/2)m (Vf2 - Vi2)

W = (1/2)*4.99kg*(76.52 - 15.12 )

W = 14032.47 J

0 0
Add a comment
Know the answer?
Add Answer to:
A constant 74.6-N force acts on a 4.99-kg box. The box initially is moving at 15.1...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 4. A constant 80-N force acts on a 5.0 kg box. The box initially is moving...

    4. A constant 80-N force acts on a 5.0 kg box. The box initially is moving at 20 m/s in the direction of the force, and 3.0 s later the box is moving at 68 m/s. Determine both the work done by this force and the average power delivered by the force during the 3.0-s interval. Ans: W=11kJ, P= 3.5kW

  • The only force acting on a 3.3 kg canister that is moving in an xy plane...

    The only force acting on a 3.3 kg canister that is moving in an xy plane has a magnitude of 6.6 N. The canister initially has a velocity of 3.7 m/s in the positive x direction, and some time later has a velocity of 4.2 m/s in the positive y direction. How much work is done on the canister by the 6.6 N force during this time?

  • he only force acting on a 4.9 kg canister that is moving in an xy plane...

    he only force acting on a 4.9 kg canister that is moving in an xy plane has a magnitude of 5.9 N. The canister initially has a velocity of 3.0 m/s in the positive x direction, and some time later has a velocity of 7.5 m/s in the positive y direction. How much work is done on the canister by the 5.9 N force during this time?

  • A force given by F(x) = 2x3 (in N/m3) acts on a 1-kg mass moving on...

    A force given by F(x) = 2x3 (in N/m3) acts on a 1-kg mass moving on a frictionless surface. The mass moves from x = 1 m to x = 5 m. Assume all motion is along a straight line. (a) How much work is done by the force? (b) If the mass has a speed of 1.0 m/s at x = 1 m, what is its speed at x = 5.0 m?

  • A force of 6.4 N acts on a 22 kg body initially at rest. Compute the...

    A force of 6.4 N acts on a 22 kg body initially at rest. Compute the work done by the force in (a) the first, (b) the second, and (c) the third seconds and (d) the instantaneous power due to the force at the end of the third second.

  • 6 points PSE6 7.P031. 4. My Notes A 38.0 kg box initially at rest is pushed...

    6 points PSE6 7.P031. 4. My Notes A 38.0 kg box initially at rest is pushed 5.20 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following. (a) the work done by the applied force (b) the increase in internal energy in the box-floor system due to friction (c) the work done by the normal force J (d) the work done...

  • A 50 N force keeps a box (m=20 kg) moving across a surface at a constant...

    A 50 N force keeps a box (m=20 kg) moving across a surface at a constant speed (v =3 m/s). If this force is applied for 30m, what is the change in the objects thermal energy?

  • A 2.10-kg frictionless block is attached to an ideal spring with force constant 325 N/m. Initially...

    A 2.10-kg frictionless block is attached to an ideal spring with force constant 325 N/m. Initially the spring is neither stretched nor compressed, but the block is moving in the negative direction at 13.5 m/s. A. Find the amplitude of the motion. Express your answer in meters. B. Find the maximum acceleration of the block. Express your answer in meters per second squared. C. Find the maximum force the spring exerts on the block. Express your answer in newtons.

  • QUESTION 5 A centripetal force of 150 N acts on an 800 kg satellite moving with...

    QUESTION 5 A centripetal force of 150 N acts on an 800 kg satellite moving with a speed of 4,500 m/s in a circular orbit around a planet. What is the acceleration of the satellite in m/s2? 0.19 m/s2 0.24 m/s2 0.30 m/s2 0.21 m/s2 QUESTION 6 An airplane has a mass of 4,800 pounds. If a force of 130,000 N is applied, what is the acceleration is g's? 5.8 g 5.0 g 4.5 g 6.1 g QUESTION 7 Static...

  • (10 pts) A constant force is applied to a 10 kg box, giving it an acceleration...

    (10 pts) A constant force is applied to a 10 kg box, giving it an acceleration of 25 m/s a. What is the magnitude of the applied force? 10. b. How much work has been done when the box moves 100 m?

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT