A91.5 kg football player running east at 2.73 m/s tackles a 63.5 kg player running east at 3.09 m/s. what is their velocity afterward?

Velocity of the players afterwards = 2.88 m/s towards east.

Explanation:

Mass of football player A = 91.5 kg

Velocity of player A = 2.73 m/s

Mass of football player B =63.5 kg

Velocity of player B = 3.09 m/s

Since both players move in same direction east, so their velocity afterwards will also be in same direction east.

By law of conservation of momentum we have:

Momentum before collision = Momentum after collision

This can be written as:

where is the velocity of the players together afterwards.

We can plugin the given value to find

Dividing both sides by 155.

∴ m/s

Velocity of the players afterwards = 2.88 m/s towards east.

4

explanation:

4

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.