An electric motor creates a tension of 4...

An electric motor creates a tension of `4500` newton in a hoisting cable and reels it at the rate of `2 m//s`. What is the power of the motor ?

15 kW

9 kW

225 W

9000 HP

Text Solution

Verified by Experts

The correct Answer is:

`P= Fv= 4500 xx 2= 9000W= 9kW`

Topper's Solved these Questions

WORK , ENERGY , POWER AND COLLISION
ERRORLESS |Exercise Ordinary Thinking (Objective Questions) (Elastic and Inelastic Collision)|68 Videos
WORK , ENERGY , POWER AND COLLISION
ERRORLESS |Exercise Ordinary Thinking (Objective Questions) (Perfectly Inelastic Collision)|30 Videos
WORK , ENERGY , POWER AND COLLISION
ERRORLESS |Exercise Ordinary Thinking (Objective Questions) (Conservation of Energy and Momentum)|87 Videos
WAVES AND SOUND
ERRORLESS |Exercise SET|25 Videos
WORK, ENERGY, POWER & COLLISION
ERRORLESS |Exercise Assertion|30 Videos

Similar Questions

Explore conceptually related problems

An electric motor exerts a force of 40 N on a cable and pulls it by a distance of 30 m in one minute. The power supplied by the motor (in Watts ) is

What is the principle of an electric motor?

An electric motor in a crane while lifting a load produces a tension of 4000 N in the cable attached to the load. If the motor is winding the cable at the rate of 3ms^(-1) , the power of the motor espressed in kilo watt units must be

An electric motor exerts a constant torque 5Nm on a fly wheel by which it is rotated at the rate of 420 rpm The power of motor is

An electric motor rotates a wheel at a constant angular velocity (omega) while opposing torque is tau . The power of that electric motor is

An electric motor operating on a 30V supply draws a current of 10A and yields mechanical power of 120W. What is the efficiency of the motor? How much energy is lost as heat in 2h?

A motor rotates a pulley of radius 25cm at 20rpm. A rope around the pulley lifts a 50kg block, What is the power output of the motor?

ERRORLESS -WORK , ENERGY , POWER AND COLLISION-Ordinary Thinking (Objective Questions) (Power)

A motor boat is travelling with a speed of 3.0m / sec . If the force o...
Text Solution
|
An electric motor exerts a force of 40 N on a cable and pulls it by a ...
Text Solution
|
An electric motor creates a tension of 4500 newton in a hoisting cable...
Text Solution
|
A weight lifter lifts 300kg from the ground to a height of 2 meter in ...
Text Solution
|
If a force vecF=5hati+5hatj+6hatk causes a displacement vecs=3hati+6ha...
Text Solution
|
An engine develops 10 kW of power. How much time will it take to lift ...
Text Solution
|
A car of mass m is driven with acceleration a along a straight level r...
Text Solution
|
The average power required to lift a 100 kg mass through a height of 5...
Text Solution
|
From a waterfall, water is falling down at the rate of 100kg / s on th...
Text Solution
|
The power of pump, which can pump 200 kg of water to height of 200 m i...
Text Solution
|
A 10 H.P. motor pumps out water from a well of depth 20 m and fills a ...
Text Solution
|
A car of mass 1250 kg is moving at 30(m)//(s). Its engine delivers 30 ...
Text Solution
|
A force applied by an engine of a train of mass 2.05xx10^6kg changes i...
Text Solution
|
A truck of mass 30,000 kg moves up an inclined plane of slope 1 in 100...
Text Solution
|
A 60 kg man runs up a staircase in 12 seconds while 50 kg man runs up ...
Text Solution
|
A pump motor is used to deliver water at a certain rate from a given p...
Text Solution
|
What average horsepower is developed by an 80 kg man while climbing in...
Text Solution
|
A car of mass 1000 kg accelerates uniformly from rest to a velocity of...
Text Solution
|
A quarter horse power motor runs at a speed of 600 r . p . m . Assumin...
Text Solution
|
An engine pumps up 100 kg water through a height of 10 m in 5 s. If ef...
Text Solution
|