Solution:
By Work Energy Theorem,
Work Done= Change in Kinetic Energy
⇒W= ½×(10/ 1000) × ( 20²- 30²) = -500/200= - 2.5 J
A bullet having mass 10 g is fired towards a fixed wooden block with velocity of 30 m/s. If it comes out of the block with velocity of 20 m/s, then the total work done by the resistive forces is
Leave a Reply