You threw a ball so it hit the floor a few feet in front of you. Will it bounce back to you? Explain how about a similar to the way waves behave, and what law should It obey 

Amachine, modeled as a simple spring-mass system, oscillates in simple harmonic motion. its acceleration is measured to have an amplitude of 5,000 mm/s with a fre- quency of 10 hz. compute the maximum displacement the machine undergoes during this oscillation.

Eddy whose mass is 55kg climbs up the 1.50 meter high stairs in 2s.calculate eddy’s power rating

When does your body conduct current more readily?