A ball weighing .2kg is traveling 20ms-1 to the left, a 20 000kg truck is traveling 25ms-1 to the right. What is the speed of the ball after the collision
(M1V1) + (M2V2)before=(M1V1) + (M2V2)after
This seemed so obvious, but i keep getting it wrong. The answer is 70ms-1. The only thing that i...
A bird can manage 50 KmHr-1 in still air. There is a wind blowing eastward at 30kmhr-1, the bird wishes to travel south. The resultant speed the bird carries in the southerly direction is?
For equations i just used vector addition, and pythagorous (A2+B2=C2)
The first time i...