Free fall Quiz 1

Question 1

The acceleration due to gravity $$g$$ acting on a body in free fall is

Accepted Answer

Same for all objects

Answer

More for bodies with more mass

Answer

Less for bodies with less density

Answer

None of the above

Question 2

If a body is made to fall freely without air resistance, then its acceleration is given by,

Accepted Answer

$$g=\dfrac{GM}{{{R}^{2}}}$$

Answer

$$g=\dfrac{Gm}{{{R}^{2}}}$$

Answer

$$g=\dfrac{GM}{R}$$

Answer

$$g=\dfrac{GM}{{{R}^{3}}}$$

Question 3

How does the acceleration of an object in free fall depend on its mass?

Accepted Answer

Does not depend on each other

Answer

Directly proportional

Answer

Inversely proportional

Answer

None of the above

Question 4

A feature and a baseball are made to fall freely from the top of a building. If we consider the friction due to air is negligible, then,

Accepted Answer

The feature and baseball reach ground at the same time

Answer

Feather reaches shortly after the baseball

Answer

Feather takes a lot longer to reach ground that the baseball

Answer

None of the above

Question 5

A ball is dropped from a building of height $$76.8$$ m at an initial velocity of $$3$$ m/s. What is the time in which it reaches the ground? $$	ext{(Take }g=9.8m/{{s}^{2}})$$

Accepted Answer

$$6$$ seconds

Answer

$$9$$ seconds

Answer

$$4$$ seconds

Answer

$$22$$ seconds