Home
Class 12
PHYSICS
A heavy box having a mass of 300 kg is p...

A heavy box having a mass of 300 kg is pulled along the floor for 10 m. If the coefficient of sliding friction is `0.2`, kilocalories of heat produced is

A

`1.4`

B

`4.1`

C

`0.14`

D

`0.41`.

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A block of mass 4 kg is placed on the floor. The coefficient of static friction is 0.4. If a force of 12 N is applied on the block parallel to the floor, the force of friction between the block and floor (g = 10 ms^(-2))

A car of mass 1000 kg is negotiating an unbanked curve of radius 20 m. If the coefficient of friction is 0.5 and g = 10 m//s^(2) the maximum safe speed of the car is

A block slides down a rough inclined plane of inclination 45^(@) . If the coefficent of kinetic friction is 0.5 , find the acceleration of the sliding block . (g=10ms^(-2)) .

A block of mass 15 kg is placed on a long trolley. The coefficient of static friction between the block and the trolley is 0.18. The trolley accelerates from rest with 0.5 m s^(-2) for 20 s and then moves with uniform velocity. Discuss the motion of the block as viewed by (a) a stationary observer on the ground, (b) an observer moving with the trolley.

A circular racetrack of radius 300 m is banked at an angle of 15^@ . If the coefficient of friction between the wheels of a race-car and the road is 0.2, what is the (a) optimum speed of the race- car to avoid wear and tear on its tyres, and (b) maximum permissible speed to avoid slipping ?

A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7N on a table with coefficient of kinetic friction = 0.1 . Compute the Work done by the applied force in 10s.

The mass of block A is 100 kg and that of block B is 200 kg. The coefficient of friction between A and B is 0.2 and that between B and ground level is 0.3. The minimum force which will make the block B move, will be:

block of mass 0-1 kg is held against a wall by applying a horizontal force of 5 N on the block. If the coefficient of friction between the block and the mass is 0.5, the magnitude of the frictional force acting on the block is :