A cinder block of mass 2.5kg is sitting on a 20 m high platform calculate its potential energy​

Apassenger walks toward the rear of a moving train. describe her motion as seen from a reference point on the train. then describe it from a reference point on the ground

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)