Laws of Motion Set 3

A cricket ball of mass 0.25 kg with speed 10 m/s collides with a bat and returns with same speed with in 0.01 s. The force acted on bat is

Two blocks of masses 1 kg and 2 kg are connected by a metal wire going over a smooth pulley as shown in figure. The breaking stress of the metal is . What should be the minimum radius of the wire used if it is not to break? Take

A flat plate moves normally with a speed towards a horizontal jet of water of uniform area of cross-section. The jet discharges water at the rate of volume per second at a speed of . The density of water is . Assume that water splashes along the surface of the plate at right angles to the original motion. The magnitude of the force acting on the plate due to the jet of water is