Acar is parked on a cliff overlooking the ocean on an incline that makes an angle of 23.1 ◦ below the horizontal. the negligent driver leaves the car in neutral, and the emergency brakes are defective. the car rolls from rest down the incline with a constant acceleration of 2.52 m/s 2 and travels 37.5 m to the edge of the cliff. the cliff is 21.1 m above the ocean. find the car’s position relative to the base of the cliff when the car lands in the ocean. the acceleration due to gravity is 9.8 m/s 2 . answer in units of m.

20.17 m

Explanation:

Given

Angle of inclination

acceleration of  car

Distance travel 37.5 m to the edge of the cliff

Velocity after travelling 37.5 m

v=13.74 m/s

Now the car is launched at an angle of with the horizontal

Vertical distance traveled

t=1.596 s

Thus car position relative to the base of the cliff

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.