To move a loaded trolley we have to_______it.

To move a loaded trolley we have __________ it.

The species diversity_________whem we move towards the equator whereas it _______when we move towards the poles.

If a person moves a trolley for a distance of 10 m with a force of 50 , then the work done is:

A (trolley + child) of total mass 200 kg is moving with a uniform speed of 36 km/h on a frictionless track. The child of mass 20 kg starts running on the trolley from one end to the other (10 m away) with a speed of 10 ms^(–1) relative to the trolley in the direction of the trolley's motion and jumps out of the trolley with the same relative velocity. What is the final speed of the trolley? How much has the trolley moved from the time the child begins to run?

A trolley was moving horizontally on a smooth ground with velocity v with respect to the earth. Suddenly a man starts running from rear end of the trolley with a velocity (3//2)v with respect to the trolley. After reaching the other end, the man turns back and continues running with a velocity (3//2)v with respect to trolley in opposite direction. If the length of the trolley is L, find the displacement of the man with respect to earth when he reaches the starting point on the trolley. Mass of the trolley is equal to the mass of the man.

A ball of mass m = 1 kg is hung vertically by a thread of length 1=1.50 m . Upper end of the thread is attached to the ceiling of a trolley of mass M = 4kg . Initially, the trolley is stationary and it is free to move along horizontal rails with out friction. A shell of mass m=1 kg , moving horizontally with velocity v_(0) = 6m//s collides with thread starts to deflect towards right At the time a maximum deflection of the thread with vertical, the trolley will move with velocity

A ball of mass in m= 1 kg is hung vertically by a thread of length l = 1.50 m . Upper end of the thread is attached to the ceiling of a trolley of mass M= 4 kg . Initially, the trolley is stationary and it is free to move along horizontal rails without friction. A shell of mass m=1 kg , moving horizontally with velocity v_(0 )= 6 m//s collides with the ball and gets stuck with it. As a result, the thread starts to deflect towards right. At the time of maximum deflection of the thread with vertical, the trolley will move with velocity