A40 kg mass is dropped from a tall rooftop and accelerates at 9.8 m/s2. what is the weight ofthe dropped object? a) 392 nb) 9.8 nc) 40 nd) 0 n

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.