Aball that has a mass of 0.25 kg spins in a circle at the end of a 1.6 m rope the ball moves at a tangential speed of 12.2 m/s
what is the centripetal force acting on the ball
a. 1.9n
b 23n
c 59n
d 93n

Describe uniform velocity and variable velocity in short

Who was the first scientist to measure speed as distance over time?

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?