First slide

Gravitational field intensity

Question

Suppose, the acceleration due to gravity at the Earth's surface is 10 m/s² and at the surface of Mars it is 4.0 m/ s². A 60-kg passenger goes from the Earth to the Mars in a spaceship moving with a constant velocity. Neglect all other objects in the sky. Which part of figure best represents the weight (net gravitational force) of the passenger as a function of time?

Moderate

A

A
B

B
C

C
D

D

Solution

Initially the weight of the passenger
$= 60 \times 10 = 600 N$
Finally the weight of the passenger $= 60 \times 4 = 240 N$ and during the flight in between somewhere its weight will be zero because at that point gravitational pull of Earth and Mars will be equal.

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