For each of the following statements determine whether it is true, false, or und

Question

For each of the following statements determine whether it is true, false, or undetermined.

1. your apparent weight is greater than mg when moving in an elevator that is accelerating upwards

2. an astronaut is weightless in the space shuttle because both the astronaut and the shuttle have the same acceleration

3. A ball that is revolving in a horizontal circle would fly in the tangential direction when releasing suddenly

4. the magnitude of the gravitation force exerted by the moon on the earth is greater than the earth exerts on the moon

5. In order for an object to travel in a circle, a force must be applied to the object that points away from the center of the circle

Explanation / Answer

1. True, on moving upward with an acceleration he apparent wieght of the object increases by following relation

W= m(g+a)

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2. False.

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3. True, when the string break or left from ball the object moves in the direction of velocity at that particular instant i.e. in the direction of instantaneous Velocity in tangential Direction.

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4. False, the gravitational pull for each other is same.

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5. False, generally a force always balance the centripital force that directed inward it can either be in form of Tension or gravitational pull.

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Comment in case any doubt.. good luck

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