A 975-kg sports car (including driver) crosses the rounded top of a hill (raduis=88.0m) at 12.0 m s. Determine
(a) the normal force exerted by the road on the car,
(b) the normal force exerted by the car on the 72.0-kg driver, and
(c) the car speed at which the normal force on the driver equals zero.
Answer:
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At every instant the ratio of the magnitude of the electric to the magnetic field in an electromagnetic wave in vacuum is equal to
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An instrument is thrown upward with a speed of 15 m/s on the surface of planet X where the acceleration due to gravity is 2.5 m/s2 and there is no atmosphere. How long does it take for the instrument to return to where it was thrown?
A) 12 s B) 6.0 s C) 10 s D) 8.0 s