A 1250-kg sports car (including the driver) crosses the rounded top of a hill (radius = 89.0 m ) at 23.0 m/s . Determine the normal force exerted by the road on the car.
Determine the normal force exerted by the car on the 70.0-kg driver.

What is the frequency of a light wave with a wavelength of 620nm

Amachine, modeled as a simple spring-mass system, oscillates in simple harmonic motion. its acceleration is measured to have an amplitude of 5,000 mm/s with a fre- quency of 10 hz. compute the maximum displacement the machine undergoes during this oscillation.

Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.