A 1000 kg car rounds an unbanked curve that has a radius of 40 m. If the driver drives at 8 m/s smoothly without sliding. How many Newtons of force was holding the car towards the center of the circle? How much acceleration is towards the center?

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

Imagine that the rightward current flows in the rod for a short time. as a result, what will the net charge on the right and left ends of the rod become? left end negative and right end positive left end negative and right end negative left end negative and right end nearly neutral left end nearly neutral and right end positive both ends nearly neutral

The resistance of 100 w bulb is less than resistance of 40 w bulb. explain the reason.