1 answer

A rock is projected upward from the surface of the Moon, at time t = 0...

Question:

A rock is projected upward from the surface of the Moon, at time t = 0 s, with an upward velocity of 35.0 m/s. The accelerati

A rock is projected upward from the surface of the Moon, at time t = 0 s, with an upward velocity of 35.0 m/s. The acceleration due to gravity at the surface of the Moon is 1.62 m/s?, and the Moon has no atmosphere. What is the closest value of the time t when the rock is descending with a speed of 25.0 m/s. 32 s. 22 s. 55 s. 48 s. 37 s.

Answers

Under uniform acceleration,v=u+at, where v is final velocity, u is initial velocity, a is acceleration and t is time.

Here,v= -25 m/s,u=35 m/s,a=-1.62 m/s2 (upward direction has been chosen as the positive direction).

So,-25=35+(-1.62)*t

=> t=(-25-35)/(-1.62)=37 s (fifth option).

.

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