Which one of the following units is a derived unit?

M L^-1 T^-2 is the dimentional formula for

A ball is thrown vertically upwards and reach at maximum height in time t.The acceleration time graph of the motion is

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.

Calculate the impulse on the ball.

Momentum = Mass x Z

Which of the following is Z?

How much force is needed to keep the system in equilibrium?

According to Newton's First Law, an object in motion will tend to

Fill in the blanks:

_____ does not change from place to place, but _____ can change because of differences in the strength of gravitational pull.

___________________________is the energy stored in a body or

system because of its position, shape and state.

If there is no friction on this track, at which point would the coaster have the most kinetic energy?

A crane lifts an 8-m long steel girder weighing 2600 N up 15 m off the ground. The crane did ___ of work.