A ball of mass 100 g is moving with a velocity of 40 ms−1. When a constant force is applied to it, it's velocity reaches 70 ms−1.
Then which of the following is correct.
A body of mass 5 kg is thrown vertically upwards from ground with a velocity of 20 ms−1. What will be its momentum just before hitting the ground? Assume upward direction as positive.
A 2 kg mass moving with a velocity of 10 ms−1 collides with another 6 kg mass moving in opposite direction with a velocity of 20 ms−1. After the collision, they stick and move together. Find their common velocity and the momentum.