Car a has a mass of 1,200 kg and is traveling at a rate of 22 km/hr. it collides with car b. car b has a mass of 1,900 kg
and is traveling in the same direction at 25 km/hr. which of the following statements is true?
the momentum before the collision is equal to the momentum after the collision.

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

What is the stall speed at sea level of an airplane that weights 10000 lbs., has a wing area of 300ft^2, and a maximum lift coefficient of 1.4? what is the stall speed if flaps that double cl,max are applied?