A9.0 kg rock starting from rest free-falls through a distance of 50.0 m. assuming no air resistance, find the amount of momentum that is transferred from the rock to earth as it collides with earth’s surface. what is the change in velocity of earth as a result of this momentum change? the earth’s mass is . show all your work, assuming the rock–earth system is closed.

beginning of the situation when the velocity of the rock is 0, before the it started to fall.

But we're looking for the CHANGE in momentum (the impulse). That means we need to know the FINAL velocity of the rock as well, in order to calculate the final momentum. Remember, the change in momentum is final momentum minus initial momentum.

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

hypothesising or postulating