A0.5 kg air-track car is attached to the end of a horizontal spring of constant k = 20 n/m. the car is displaced 15 cm from its equilibrium point and released.
a) what is the car's maximum speed? b) what is the car's maximum acceleration? c) what is the frequency f of the car's oscillation?
i need ! do it step by step and then substitute the numbers into that equation

Amachinist needs to remove a tight fitting pin of material a from a hole in a block made of material b. the machinist heats both the pin and the block to the same high temperature and removes the pin easily. what statement relates the coefficient of thermal expansion of material a to that of material b? a) the situation is not possible, heating block b will shrink the hole in the material as the material expands with increasing temperatureb) material b has the same coefficient of expansion as does material ac) material b has a negative coefficient of expansion and a has a positive coefficient of expansiond) material a has a greater coefficient of expansion than does material be) material b has a greate

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.