A boy sits motionless partway down a playground slide the force of friction balances the force of gravity a girl hands the boy a book why does the boy still not move ?

Asteady current of 1 ais flowing through a conducter calculate the number of electrons that flows through conductor in 1second

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

Diamond will scratch quartz. true or false