A block weighing 500 N is dropped from a height of 1.2 m upon a spring whose modulus is 20 n/mm. What velocity will the block have at the instant the spring is deformed 100 mm?

Suppose a block is moving in a certain direction with constant velocity then what will be the magnitude of the force?

Which example of the change in velocity will produce an acceleration

1. A boy running on a road with constant speed

2. A vehicle running with 50 m/sec speed

3. An object performing circular motion with constant speed

4. A particle moving in the vacuum with constant speed

Identify two true statements about projectiles among the following

1. The horizontal component of velocity always remains constant during projectile

2. The vertical component of velocity remains constant during projectile

3. The vertical component of velocity changes due to the downward gravity

4. The kinetic energy becomes zero at maximum height