Question

What power is needed to lift a 410-kg crate of bricks from the ground to the...

What power is needed to lift a 410-kg crate of bricks from the ground to the top of a 21.5-m-high building in 7 minutes? Give your answer in Watts.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Work done in lifting= Change in potential energy

Then,  

Using given and known values in above,

Time taken,

Then,

Power needed to lift is given by,

  (ANS)

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
You just realized that your analogue wrist watch is always 5 seconds slower and hence always...
You just realized that your analogue wrist watch is always 5 seconds slower and hence always behind the real time. Calculate the angular speed of your: Second hand Hour hand A 30 kg skip attached to a steel rope on a crane is used to hoist bricks from the ground to the top of a construction site. The steel rope is wound onto a lifting drum with a radius of 20 cm and rotational frequency of 15 revolutions per minute....
An elevator weighing 565kg lifts a 250 lbm crate from the ground floor of a building...
An elevator weighing 565kg lifts a 250 lbm crate from the ground floor of a building to a floor 918 ft higher (roughly the height of the top floor in the Bank of America building in midtown Atlanta). What is the minimum amount of energy required to accomplish this. Give the answer in both ft-lbf and J. Also, if the elevator requires 30. seconds to make the trip, what is the average power requirement
An express lift (elevator) takes a 70 kg passenger from street level to the top of...
An express lift (elevator) takes a 70 kg passenger from street level to the top of a 400 m skyscraper in 4 minutes. The mass of the elevator itself is 500 kg a. How much gravitational potential energy does the passenger gain on the way up? b. At what rate (energy per second) is the passenger gaining potential energy? c. At what rate is the lift plus the passenger gaining potential energy? d. What power is the lift plus the...
What is the average power required to lift a 100 kg object with a uniform speed...
What is the average power required to lift a 100 kg object with a uniform speed of 2 m/s?
A small motor has a power rating of 2.24 kW. It is used to lift a...
A small motor has a power rating of 2.24 kW. It is used to lift a crate. (a) The motor is able to lift the crate 1.5 m in 4 s. What is the mass of the crate? (b) This motor is then used to push a 200 kg box along the floor. If the box is travelling at 2 m/s, what would be the maximum acceleration from the motor at this velocity? (c) What would be the kinetic energy...
A crate with a mass of 3.00 kg starts from rest at the top of a...
A crate with a mass of 3.00 kg starts from rest at the top of a 28.0° incline and slides 2.00 m down the incline in 1.25 s. (a) What is the magnitude of the acceleration of the crate (in m/s2)? 2.56 m/s2 correct b) What is the frictional force (in N) acting on the crate? (Enter the magnitude.) (c) What is the coefficient of kinetic friction between the crate and the incline? (d) What is the speed of the...
1) A force of 210 N is needed to push a table across a level classroom...
1) A force of 210 N is needed to push a table across a level classroom floor for a distance of 2.8 m. How much work was done on the table? 2) Use g = 9.8 m/s2. If 4,090 J of work is used to raise a 118 kg crate to a shelf in a warehouse, how high was the crate raised? 3) Use g = 9.8 m/s2. A 66.2 kg student runs up a 5.25 m high stairway in...
6. What is the difference in work needed to push a 100 kg crate (at constant...
6. What is the difference in work needed to push a 100 kg crate (at constant speed) a distance of 2 m along an inclined plane that is at an angle of 20 degrees with the horizontal, if the coefficient of kinetic friction was equal to 0.20 or zero?
A 2.00 kg ball is thrown straight upward from the top of a 50.0 m high...
A 2.00 kg ball is thrown straight upward from the top of a 50.0 m high building with an initial speed of 10.0 m/s. (25 points)        Given:        a. What is the total energy at the top of the building?        b. What is the total energy at the ground?        c. What are the potential and kinetic energies at the ground?        d. What is its speed at the ground?
A crate of fruit with a mass of 39.0 kg and a specific heat capacity of...
A crate of fruit with a mass of 39.0 kg and a specific heat capacity of 3600 J/(kg⋅K) slides 8.70 m down a ramp inclined at an angle of 38.3 degrees below the horizontal. Part A If the crate was at rest at the top of the incline and has a speed of 2.65 m/s at the bottom, how much work Wf was done on the crate by friction? Use 9.81 m/s2 for the acceleration due to gravity and express...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT