Question

A boy fires a table tennis launcher. Briefly describe the forces and impulses on the launcher and the ball. Explain which has momentum. Explain which is moving faster. Be sure to use at least 3 to 4 complete content related sentences.

Answer 1

The forces are equal because of Force = mass x acceleration. The launcher has a greater mass therefore the acceleration is less. The ball has a greater acceleration and less mass, the ball is faster. ( m delta t) Impulse = mass x velocity = momentum (m delta v) assuming the launcher has more mass, the ball has more momentum.

{My friend helped me with this one}

Answer 2

As we know by Newton's III law that if an action force is applied on an object then the reaction force of same magnitude in opposite direction will act on the other.

So here when ball is shot using launcher then the force will be same on launcher as well as ball so we can say

`F_(ball) = -F_(launcher)`

now since force is of same magnitude for both both then we will have

`\Delta P_(ball) = - \Delta P_(launcher)`

so from above we can say that both ball and launcher will have same impulse but opposite in direction.

Now since ball will have less mass so here it will have more speed while launcher is heavy in mass so its speed is slow or very small as comapre to ball.