ZuoTi.Pro
Question

A 3.0 kg box is raised from rest a distance of 5.0 m by a vertical force of 90 N (a) Find the work done by the force. b) Find the work done by gravity (c) Find the final kinetic energy of the box. eBook

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

Homework Answers

Answer #1

(a)

Work done by force,

W = F*d = 90*5

W = 450 J

(b)

Work done by gravity,

W = -mgd = -3*9.8*5

W = -147 J

(c)

Final KE = Wnet

KEf = 450 - 147

KEf = 303 J

0 0
Add a comment
Know the answer?
Add Answer to:
A 3.0 kg box is raised from rest a distance of 5.0 m by a vertical...
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

  • Starting from rest, a student pulls a (25.0+A) kg box a distance of (4.50 + B)...

    Starting from rest, a student pulls a (25.0+A) kg box a distance of (4.50 + B) m across the floor using a (134 + C) N force applied at 35.0 degrees above horizontal. The coefficient of kinetic friction is 0.220 between the floor and the box. Find the work done by the pulling force. Give your answer in joules (J) and with 3 significant figures. A=1 B=3 C=11

  • 3.0 kg box is pushed with a force of 20N at a downward 45° angle —...

    3.0 kg box is pushed with a force of 20N at a downward 45° angle — in the same direction of motion — for a distance of 2.0 m.(A)How much is the work done on the box?(B)How much does person’s energy change?(C)What is the final kinetic energy of the box?(D)What is the final speed of the box?(E)How much is the box accelerating?

  • please qickly 2) A 20 kg box initially at rest is pushed 5 m along a...

    please qickly 2) A 20 kg box initially at rest is pushed 5 m along a rough, horizontal floor with a constant applied horizontal force of F = 120 N. The coefficient of kinetic friction between box and floor is 0.1, find; a) (12 p) Calculate the work done by the applied force, the gravitational force, the normal force, the friction force (Wr.W, W.,WR) b) (4 p) Find the change in kinetic energy of the box c) (4 p) Find...

  • 5. An electric lift can raise a 250.0 kg load a distance of 10.0 m in...

    5. An electric lift can raise a 250.0 kg load a distance of 10.0 m in 2.5 s. What is the power of the lift? (10 points) 6.what is the velocity of a 8.00 kg bowling ball if its kinetic energy is 87.5J?(15points) 7.A 800 N box is pushed across a level floor for a distance of S.0 m with a force of 450 N. How much work was done on the box? (15points) 8. A horizontal force of 19.6...

  • A force of 30 N accelerates a 2.0 kg object from rest for a distance of...

    A force of 30 N accelerates a 2.0 kg object from rest for a distance of 3.0 m along a level, frictionless surface; the force then changes to 15 N and acts for an additional 2.0 m.  (a) What is the final kinetic energy of the object?  (b) How fast is it moving?

  • A +3.0 nC charge Q is initially at rest a distance of 10 cm(r₁) from a +5.0 nC charge

    A +3.0 nC charge Q is initially at rest a distance of 10 cm(r₁) from a +5.0 nC charge q fixed at the origin. Naturally, the Coulomb force accelerates Q away from q, eventually reaching 15 cm(r₂).The charge Q is repelled by q, thus having work done on it and losing potential energy. What is the work done by the electric field between r₁ and r₂? What is the change in the potential energy of the two-charge system from r₁...

  • 10) A 3.0-kg and a 5.0-kg box rest side-by-side on a perfectly smooth, level floor. A...

    10) A 3.0-kg and a 5.0-kg box rest side-by-side on a perfectly smooth, level floor. A horizontal force of 32 N is applied to the 3.0-kg box pushing it against the 5.0-kg box, and, as a result, both boxes slide along the floor. How hard do the two boxes push against each other? A) 12 N

  • 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...

  • 3. Starting from rest, a box of mass M slides through a distance d down a...

    3. Starting from rest, a box of mass M slides through a distance d down a incline. The coefficient of friction on the plane is ple (a) Draw a free body diagram. (b) Determine the work done by the gravity- express this in terms of M, g, e, d. (c) Determine the work done by the friction-express this in terms of M, g, 0, d, u. (d) Use Work-Energy theorem to determine the final velocity of the box.

  • A box of mass 40 kg is initially at rest on a flat floor. The coefficient...

    A box of mass 40 kg is initially at rest on a flat floor. The coefficient of kinetic friction between the box and the floor is µk = 0.40. A woman pushes against the box with a force of 250 N that makes an angle of 30° with the horizontal until the box attains a speed of 1.0 m/s. (a) What is the change of kinetic energy of the box? (b) What is the work done by the friction force...

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