Aball is projected upward at time t=0.0s, from a point on a roof 90m above the ground. the ball rises, then falls and strikes the ground. the initial velocity of the ball is 37.0m/s if air resistance is negligible. the time when the ball strikes the ground is closest to

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?