Force, Friction...

If the same force is applied on a toy car, on which of the following. It will move with maximum speed?

Two boxes filled with books, one is of 2kg and other is of 4kg are kept on a cemented floor. Which one of them would require a larger force to move it from the rest position?

The maximum friction will be observed between two objects when:

P and Q are two forces applied on object 0 in the same direction, then the resultant force acting on the object is equal to:

A list of mediums is given below:

(i) Wood
(ii) Water
(iii) Air
(iv) Vacuum

In which of these mediums can sound travel?

100 Pascal is equal to:

As we go up in the atmosphere from the surface of earth, the atmosphere pressure decreases due to decrease in ______ of air above us.

While playing tugs of war we often feel that the rope is slipping through our hands. We rub soil on our hands to:

Friction can be reduced by:

Ball bearing is used between the hub of wheel and axle to ___ the friction.