A0.199 kg snowball moving west makes an inelastic collision with a 2.89 kg box moving 0.523 m/s west. afterward, they move west at 1.92 m/s. what was the initial velocity of the snowball?m

The initial velocity of the snowball was 22.21 m/s

Explanation:

Since the collision is inelastic, only momentum is conserved. And since the snowball and the box move together after the collision, they have the same final velocity.

Let be the mass of the ball, and be its initial velocity; let be the mass of the box, and be its velocity; let be the final velocity after the collision, then according to the law of conservation of momentum:

.

From this we solve for , the initial velocity of the snowball:

now we plug in the numerical values , , , and to get:

The initial velocity of the snowball is 22.21 m/s.

P.S: we did not take vectors into account because everything is moving in one direction—towards the west.

it is called kinetic energy

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.