A man exerts a force of 200N in pulling ...

A man exerts a force of 200N in pulling a cart at a constant speed of `16m//s` Calculate the power spent by the man.

Text Solution

Verified by Experts

The correct Answer is:

B, C

Power spent by the man, `P = F upsilon =(200N) (16m//s) = 3200W = 3.2kW`

Topper's Solved these Questions

WORK AND ENERGY
PRADEEP|Exercise Continuous Assessment|24 Videos
WORK AND ENERGY
PRADEEP|Exercise Assessment Through paper pen Test|30 Videos
WORK AND ENERGY
PRADEEP|Exercise Multiple choice Questions|9 Videos
SOUND
PRADEEP|Exercise Model Test (sec - B)|12 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

A spring is compressed by a toy cart of mass 150g. On releasing the cart, it moves with a speed of 0.2 m//s . Calculate the elastic potential energy of the spring.

A ship is sailing towards east in a traight line motion, with a speed of 10m//s . A man on the deck is moving across it , towards north, with a speed of 6 m//s calculate the velocity of the man relative to the sea.

A lorry of mass 2000 kg is traveling up a hill of certain height at a constant speed of 10 m/s. The frictional resistance is 200 N, then the power expended by the coolie is : (g=10 m//s^(2))

A man is travelling in a train towards the station with a speed of 50 m/s. calculate the apparent frequency heard by him of whistle which is blown at the station with a frequency 200 Hz. Velocity of sound in air is 350 m/s.

A man is supplying a constant power of 500 (J)/(s) to a massless string by pulling it at a constant speed of 10(m)/(s) an shown. It is known that kinetic energy of the block is increasing at a rate of 100(J)/(s) . Then the mass of the block is:\

A man cycling up a smooth inclne road, climbs the road at a constant spped of 2m/s. The total mass of the man and the cycle is 150 kg and the inclination of the road with the horizonal is 30^(@) . What is the minimum horse power spend by the man? [Take g=10m//s^(2) and 1 horse power =750 watt]

A machine gun can fire bullets of 50 grams at a Speed of 2000 m s^(-1) , the man holding the gun can exert an average force of 200 N against the gun. Calculate the maximum number of bullets which he can fire per minute.

Across a horizontal floor, a 102 kg block is pulled at a constant speed of 5.5 m/s by an applied force of 125 N directed 38^(@) above the horizontal. Calculate the rate at which the force does work on the block.

PRADEEP-WORK AND ENERGY-Problems for Practice

Two bodies of equal masses move with uniform velocities upsilon and 3...
Text Solution
|
The mass of a ball A is double the mass of another ball B. The ball a...
Text Solution
|
A truck weighing 5000 kg f and a cart weighing 500 kg f are moving wit...
Text Solution
|
A bullet of mass 20g is found to pass two points 30m apart in 4 s? Ass...
Text Solution
|
Find the energy possessed by an object of mass 10 kg when it is at a h...
Text Solution
|
An object of mass 12 kg is at a certain height above the gorund if the...
Text Solution
|
A block of mass 30 kg is pulled up by a rope as shown in Fig. with a c...
Text Solution
|
shows a ski -jump. A skier of mass 60 kg stands at A at the top of the...
Text Solution
|
Calculate the increase in potential energy as a block of 2kg is lifted...
Text Solution
|
A ball of mass 1kg is dropped from a height of 5m. (a) Find the kineti...
Text Solution
|
A body of mass 5kg falls from a height of 5m. How much energy does it...
Text Solution
|
A spring is compressed by a toy cart of mass 150g. On releasing the ca...
Text Solution
|
Two girls each of weigth 400N, climb up a rope through a height of 8m....
Text Solution
|
A boy of mass 50kg runs up a staricase of 45 steps in 9s. If the heigh...
Text Solution
|
An electric bulb of 60 W is used for 6 h per day. Calculate the units ...
Text Solution
|
A 60 kg person climbs stairs of total height 20m in 2min. Calculate th...
Text Solution
|
The work done by the heart 1J per beat. Calculate the power of the hea...
Text Solution
|
A man exerts a force of 200N in pulling a cart at a constant speed of ...
Text Solution
|
Calculate the power of an engine required to lift 10^5kg of coal per h...
Text Solution
|
A man does 200 J of work in 10s and a boy does 100 J of work in 4s. (a...
Text Solution
|