You are standing on a skateboard and your friend pushes you with a force of 120 N. If your mass is 40 kg and there is 40 N of air resistance acting on you, what will your acceleration in the x direction be? Neglect friction.

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Suppose you hit your hand against the edge of table. using newton’s third law of motion why does my hand hurt? explain