Laws of Motion

A particle is projected at 60° to the horizontal with a kinetic energy K. The kinetic energy at the highest point is 

• K

• 0

• K/2

• K/4

A bomb of mass 16 kg at rest explodes into two pieces of masses of 4 kg and 12 kg. The velocity of the 12 kg mass is 4 ms⁻¹ . The kinetic energy of the other mass is

• 144 J

• 96 J

• 288 J

• 192 J

A mass of M kg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of 45° with the initial vertical direction is

A player caught a cricket ball of mass 150 g moving at a rate of 20 m/s. If the catching process is completed in 0.1 s, the force of the blow exerted by the ball on the hand of the player is equal to

• 300 N

• 150 N

• 30

• 3 N