Abullet of mass of 0.05kg is fired horizontally into a 10 kg block which is free to move with a velocity of 0.5mls after impact find the velocity with which the bullet hit the body? show work plz..

It is given that :

Mass of bullet, = 0.05 Kg

Mass of block, = 10 kg

velocity after impact, v = 0.5 m/s

Let  is the velocity with which the bullet is fired.

Using law of conservation of momentum :

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.