HomeworkLib
Question

A 8.5-kg box is being lifted by means of a light rope that is threaded through...

A 8.5-kg box is being lifted by means of a light rope that is threaded through a single, light, frictionless pulley that is attached to the ceiling.

(a) If the box is being lifted at a constant speed of 2.0 m/s, what is the power delivered by the person pulling on the rope?


(b) If the box is lifted, at constant acceleration, from rest on the floor to a height of 1.3 m above the floor in 0.42 s, what average power is delivered by the person pulling on the rope?

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

Homework Answers

Answer #1

mg PARTLいね1.2 hX3 473 m/sec +2 (0.42) final velocity, = JRxax-h ヲ、RX14-73x13 2. 162173 J eyneo the box affen Thans hore, te a

0 0
Add a comment
Know the answer?
Add Answer to:
A 8.5-kg box is being lifted by means of a light rope that is threaded through...
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

  • A 8.2-kg box is being lifted by means of a light rope that is threaded through...

    A 8.2-kg box is being lifted by means of a light rope that is threaded through a single, light, frictionless pulley that is attached to the ceiling. If the box is lifted, at constant acceleration, from rest on the floor to a height of 1.8 m above the floor in 0.42 s, what average power is delivered by the person pulling on the rope? Answer in kW

  • A 15.0 kg box is being pulled across a rough floor at a constant acceleration of 3.00 m/s^2 by means of a rope. The rope...

    A 15.0 kg box is being pulled across a rough floor at a constant acceleration of 3.00 m/s^2 by means of a rope. The rope makes an angle of 34.0 degrees above the horizontal. The coefficient of kinetic friction between the floor and the box is u=0.250. Calculate the magnitude of the tension in the rope?

  • 1. A 4 kg block is placed on a smooth 30° incline and released from rest,...

    1. A 4 kg block is placed on a smooth 30° incline and released from rest, but a string connected to the block runs up the incline parallel to the surface, over a frictionless pulley, and horizontally to a 6 kg block on a level surface with a kinetic friction coefficient of 1/6. Find the acceleration of the system and the speed at the end of 4 s assuming the 6 kg block doesn't run into the pulley first. 2....

  • A 2- kg box and a 4-kg box are attached to either ends of a rope...

    A 2- kg box and a 4-kg box are attached to either ends of a rope which goes around a massless, frictionless pulley attached to the ceiling. When let go, the heavier box accelerates downwards, while the lighter one accelerates upwards. Calculate the Tension in the rope connecting the two boxes. (use g = 9.81 m/s^2)   

  • A 10 kg box resting on a horizontal, frictionless surface is attached to a 4 kg...

    A 10 kg box resting on a horizontal, frictionless surface is attached to a 4 kg block by a thin light rope that passes over a frictionless pulley. The pulley has a shape of a uniform solid disk of mass 4.5 kg and a radius of 0.55 m. After the system is released 10 kg box moves to the right, 4 kg block moves down and the pulley rotates clockwise. 7 Find: (a) the magnitude of the tension (in N)...

  • A 15.0-kg box is being towed by a child pulling on a rope at an angle...

    A 15.0-kg box is being towed by a child pulling on a rope at an angle of 20.0-deg above the horizontal with a force of 200.0-N. If the force of friction is 20.0-N, then what is the acceleration of the box across the floor?

  • Two boxes are connected to a rope, and the rope is hung over a pulley connected to the ceiling

    Two boxes are connected to a rope, and the rope is hung over a pulley connected to the ceiling, as shown in the figure below.The masses of the boxes are m1=18.0 kg and m2=12.0 kg, the mass of the pulley is M=5.00 kg, and the radius of the pulley is R=0.300 m. Box m2 is initially on the floor, and box m1 is initially 4.70 m above the floor when it is released from rest. The pulley's axis has negligible...

  • Problem #4 A 10 kg box resting on a horizontal, frictionless surface is attached to a...

    Problem #4 A 10 kg box resting on a horizontal, frictionless surface is attached to a 4 kg block by a thin light rope that passes over a frictionless pulley. The pulley has a shape of a uniform solid disk of mass 4.5 kg and a radius of 0.55 m. After the system is released 10 kg box moves to the right, 4 kg block moves down and the pulley rotates clockwise. Find: (a) the magnitude of the tension (in...

  • A light rope is attached to a block with mass 3.40 kg that rests on a...

    A light rope is attached to a block with mass 3.40 kg that rests on a frictionless, horizontal surface. The horizontal rope passes over a frictionless, massless pulley, and a block with mass m is suspended from the other end. When the blocks are released, the tension in the rope is 19.1 N . c. What is the acceleration of either block? Express your answer with the appropriate units. d. Find m. Express your answer with the appropriate units. e....

  • A 20.0kg box is suspended by a very light rope wrapped around a solid disc of...

    A 20.0kg box is suspended by a very light rope wrapped around a solid disc of 0.5m in diameter. The mass of the disc is 10kg. The disc pivots on a frictionless axle through its center. The box is then released from rest and falls 15m to the floor. Moment of inertia of a solid disc I=1/2_MR^2. a) Draw free body diagram for the box and the disc. b) Determine the tension in the rope while the box is falling....

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