A25 kg child bounces on a pogo stick. the pogo stick has a spring with spring constant 2.0x10^4 n/m. when the child makes a nice big bounce, he finds that at the bottom of the bounce he is accelerating upwards at 9.8 m/s^2. how much is the spring compressed?

When an object moves in uniform circular motion, the direction of its acceleration is a) in the same direction as its velocity vector. b) in the opposite direction of its velocity vector c) is directed toward the center of its circular path. d) is directed away from the center of its circular path. e) depends on the speed of the object.

How would a small bar magnet be oriented when placed at position x?

What was the first instrument to ever record an earthquake?