Select ALL the correct answers. Two metal balls are dropped from the top of a two-story building at the same time. One ball is twice as heavy as the other ball. Which statement about their motion are true? Assume that air resistance isn’t a factor.

1.)The balls fall with constant velocity.

2.)The balls fall with constant acceleration.

3.)The velocity of the heavier ball is twice that of the lighter ball.

4.)The balls land at the same time.

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.