The spring in a toy rocket launcher has a spring constant of 80 n/m. how far must you compress the spring to cause it to exert a force of 2 n

A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface