The acceleration of a particle along a straight line is defined by a=(2t−9)m/s2a=(2t−9)m/s2, where tt is in seconds. At tt = 0, ss = 1 mm and vv = 10 m/sm/s.

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)

Is a copper wire a conductor or insulator?