An electric motor has a rating of 4.0 × 10^2 watts.
how much time will it take for this motor to lift a
50.-kilogram mass a vertical distance of 8.0 meters?
[assume 100% efficiency.]
(1) 0.98 s (3) 98 s
(2) 9.8 s (4) 980 s

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

Which composition of water moves to begin a deepwater current?

Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.