Which of the following describes a displacement vs. time graph that looks like this? A)Increasing Velocity

B)Constant Velocity

C)Constant Non-Zero Acceleration

D)Decreasing Acceleration

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.