A pile driver of mass 200kg falls vertically through 3.2m on to pile of mass 600kg .Which it drives into the ground through a distance of 0.08m. If the pile driver remains in contact with pile after collision.Find the resistance offered by the ground .`(g=10ms^(-2))`

The foot of an elephant has an area of 275cm^(2) . If the mass of the elephant is 2200 kg, find the pressure exerted by the on the ground. ( g=10ms^(-2) )

A body of mass 200 kg is dragged through a distance of 8m on a level ground. What is the work done, if the coefficient of friction is 0.25?

A hainmer of mass Mkg falls from a height h meter upon the top of an inelastic pile of mass m kg and drive it into the groung a sistance x meter. Find the resistance of the ground ehen it is assumed to be constant. Find also the time during which the lile is in motion and the kinetic energy lost at the impact.

An object of mass 12 kg is at a certain height above the ground. If the potential energy of the object is 480 J, find the height at which the object is with respect to the ground. Given. g=10 ms^(-2) .

A hammer of mass M falls from height h to drive a pile of mass m into the ground. The hammer makes the pile pentrate in the ground to a distance d, opposition force of penetration is given by -

A body of mass 0.02 kg falls from a height of 5 metre into a pile of sand. The body penetrates the sand a distance of 5 cm before stoping. What force has the sand exerted on the body ?

A body of mass 10 kg dropped from a height 20 m, acquires a velocity of 10m/s after a falling through a distance of 20m. What is the work done by the air resistance on the body?

An uniform rod of mass m=30 kg and length l=0.80 m is free to rotate about a horizontal axis O passing through its centre. A particle P of mass M=11.2 kg falls vertically through a height h=36/245 m and collides elastically with the rod at a distance l/4 from O . at the instant of collision the rod was stationary and was at angle alpha=37^(@) with horizontal as shown in figure Velocity of particle P after collision (g=10ms^(-2))

A man drags a body of mass 200kg on a surface having coefficient of friction 0.1 through a distance 10m in 5 seconds.The power of man is ?