Question

3.) A worker lifts 80 concrete blocks a distance of 1.5 m from the ground into...

3.) A worker lifts 80 concrete blocks a distance of 1.5 m from the ground into the back of a truck. Each block has a mass of 5.0 kg. How much work is done to lift all of the blocks into the truck?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Work done is equal to change in potential energy plus change in kinetic energy of the block. But change in kinetic energy is zero because the blocks are being lifted with zero speed. Hence work done will be equal to change in potential energy of the blocks when they are lifted by the given height.

0 0
Know the answer?
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
Similar Questions
Two blocks of mass m1 (3.0 kg) and m2 (4.0 kg) on a leveled ground (Muk=0.25)...
Two blocks of mass m1 (3.0 kg) and m2 (4.0 kg) on a leveled ground (Muk=0.25) are connected via a rigid light string. A constant force of 40.0 N is pulling on m1 forward with an angle of 30.0 degrees with respect to the ground. draw a free body diagram of each block, find the acceleration of the blocks, calculate the work done by each force on m1 and m2, use work and Kinetic theory to find the speed of...
A factory worker pushes a 29.8 kg crate a distance of 5.0 m along a level...
A factory worker pushes a 29.8 kg crate a distance of 5.0 m along a level floor at constant velocity by pushing downward at an angle of 30 ∘ below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26. 1.What magnitude of force must the worker apply to move the crate at constant velocity? 2.How much work is done on the crate by this force when the crate is pushed a distance of 5.0 m...
A factory worker pushes a 29.8 kg crate a distance of 5.0 m along a level...
A factory worker pushes a 29.8 kg crate a distance of 5.0 m along a level floor at constant velocity by pushing downward at an angle of 30 ∘ below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26. 1.What magnitude of force must the worker apply to move the crate at constant velocity? 2.How much work is done on the crate by this force when the crate is pushed a distance of 5.0 m...
A cable lifts a 1080-kg elevator at a constant velocity for a distance of 33 m....
A cable lifts a 1080-kg elevator at a constant velocity for a distance of 33 m. What is the work done by each of the following? (a) the tension in the cable J (b) the elevator's weight J
A factory worker moves a 29.0 kg crate a distance of 5.30 m along a level...
A factory worker moves a 29.0 kg crate a distance of 5.30 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.300. a) What magnitude of force must the worker apply? b) How much work is done on the crate by the worker's push? c) How much work is done on the crate by friction? d) How much work is done by the normal...
A factory worker moves a 21.0 kg crate a distance of 4.80 m along a level...
A factory worker moves a 21.0 kg crate a distance of 4.80 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.300. What magnitude of force must the worker apply? (N) How much work is done on the crate by the worker's push? (J) How much work is done on the crate by friction? (J) How much work is done by the normal force?...
A factory worker pushes a crate of mass 30.9 kg a distance of 4.10 m along...
A factory worker pushes a crate of mass 30.9 kg a distance of 4.10 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and floor is 0.26. Part A) What magnitude of force must the worker apply? Express your answer using two significant figures. Part B) How much work is done on the crate by this force? Express your answer using two significant figures. Part C) How much...
A factory worker pushes a 30.0-kg crate a distance of 4.50 m along a level floor...
A factory worker pushes a 30.0-kg crate a distance of 4.50 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.250. 17 (a) What magnitude of force must the worker apply? (b) How much work is done on the crate by this force? (c) How much work is done on the crate by friction? (d) How much work is done by the normal force?...
A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by...
A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. The lift is performed in three stages, each requiring a vertical distance of 11.2 m. (1) First, the initially stationary spelunker is accelerated to a speed of 4.60 m/s. (2) He is then lifted at the constant speed of 4.60 m/s. (3) Finally he is decelerated to zero speed. How much work is done on the 74.0 kg rescuee...
A mass m1 = 5.2 kg rests on a frictionless table and connected by a massless...
A mass m1 = 5.2 kg rests on a frictionless table and connected by a massless string to another mass m2 = 5.2 kg. A force of magnitude F = 38 N pulls m1 to the left a distance d = 0.83 m. 1) How much work is done by the force F on the two block system? 2) How much work is done by the normal force on m1 and m2? 3) What is the final speed of the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT