Question

A 2.00kg Ball Is Moving At 3.00m/S Toward The Right. It Collides Elastically With A 4.00kg Ball That Is Initially At Rest. Determine The Velocities Of The Balls After The Collision.

Answer 1

I got -3m/s

Step-by-step explanation:

For this, we'll have to use the formula;

Total momentum before = Total momentum after

Since this is an elastic collision, the balls' velocity will be a negative value.

Substitute the values into the equation like so;

(2 × 3) + (4 × 0) = (2 × -v) + (4 × v)

6 + 0 = (-2v) + 4v

6 = -2v

6/-2 = v

∴ v = -3m/s

I hope this helps! Please let me know if I have any misconceptions or miscalculations!