Question

A rubber ball thrown at a speed of 5 m/s hit a flat wall and

returned to the thrower at a speed of 5 m/s. Which
statement correctly describes the momentum of the rubber
ball?

Answer 1

See the explanion below

Step-by-step explanation:

Linear momentum is defined as the product of mass by velocity and can be calculated by the following equation.

`P =m*v`

where:

P = momentum [kg*m/s]

m = mass [kg]

v = velocity [m/s]

When the ball hits the wall it receives a force for a very short time, this time and force value is known as momentum and can be calculated by the following expression.

`-(m_(1)*v_(1)) + (F*t)=(m_(1)*v_(2))`

where:

m₁ = mass of the ball [kg]

v₁ = 5 [m/s]

v₂ = 5 [m/s]

v₁ = v₂

`F*t = Imp`

`Imp = (m_(1)*v_(1))+ (m_(1)*v_(2))\\Imp = 2*m*v_(1)`

It can be said that the impulse is equal to 2 times the speed of throwing by the mass.