Question 1 T T
A cart approaches a hill at an unknown velocity. It comes to rest at the top of the hill. Assume friction is negligible.
E
5.00 kg
10.0 m
E
Which is the best estimate for the amount of kinetic energy that the cart had at the bottom of the hill?
Pos
A
4.91 Joules
Us
B
50.0 Joules
С
250 Joules
D
490 Joules

Place me with this question is my last question

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.

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?