Home
Class 9
PHYSICS
A car of weight 20000 N drives up a hill...

A car of weight 20000 N drives up a hill at a steady speed of 8 m/s, gaining a height of 120 m in 100 s. Calculate (i) the work done by the car and (ii) the power of the engine of the car.

Text Solution

Verified by Experts

The correct Answer is:
(i) `24xx10^(5)j (ii) 24xx10^(5)W`
Promotional Banner

Similar Questions

Explore conceptually related problems

A car of mass M moves up an inclined road making an angle theta with the horizontal with constant speed nu . If mu is the coefficient of friction between the tyre of the car and the road, show that the power of the engine of the car is P = nu Mg (sin theta + mu cos theta) .

A car of mass M moves up an inclined road making an angle theta with the horizontal with constant speed v. if mu is the coefficient of friction between the type of the car and the road, show that the power of the engine of the car is P=vMg(sin theta+mu cos theta) .

A body of mass 10 kg is raised to a height of 10 m with an upward force of 196 N . Find the work done by the upward force and the work done against gravitation. Show that the total energy in this case is equal ot the work done by the upward force . [g=9.8 m*s^(-2) ]

A railway engine of mass 12,000 kg is moving at constant speed of 5m*s^(-1) up an inclined of 15^@ . Calculate the power of the engine. Given g=9.8 m*s^(-2) .

A car of mass M moves upward with a constant speed v along an inclined road making an angle theta with the horizontal . If mu be the coefficient of friction between the road and the wheel of the car, show that the power of the engine of the car is P=vMg(sin theta +mucos theta) .

A car of mass M moves upward with a constant speed v along an.. inclined road making an angle theta with the horizontal. If mu be the coefficient of friction between the road and the wheel of the car, show that the power of the engine of the car is P= vMg(sin theta + mu cos theta ).

A car of mass 1500 kg is moving with a speed of 12.5 m cdot s^(-1) on a circular path of radius 20 m on a level road. What should be the frictional force between the car and the road so that the car does not slip? What should be the value of the coefficient of friction this force?

A hammer of mass 1 kg hits a nail at a speed of 10 m. s^(-1) . For this, the nail penetrates 2 cm through a wooden plank. Calculate (i) impulse due to the hammer, (ii) the applied force and (iii) the time of contact between the hammer and the nail.