Assertion (A) : On moon, a man feels heavier than on earth.

Reason (R) : This is due to the lower value of 'g' on moon.

1. both A and R are true and R is the correct explanation of A
2. both A and R are true and R is not the correct explanation of A
3. assertion is false but reason is true
4. assertion is true but reason is false

Assertion (A) : If the distance between bodies of masses M₁ and M₂ is increased by a factor of 4, the gravitational force reduces by 1/16.

Reason (R) : The gravitational force is inversely proportional to the square of distance between two bodies.

1. both A and R are true and R is the correct explanation of A
2. both A and R are true and R is not the correct explanation of A
3. assertion is false but reason is true
4. assertion is true but reason is false

Assertion (A) : A swimmer pushes the water backward to move forward in a swimming pool.

Reason (R) : Water exerts a greater but opposite force on the swimmer, helping him to move forward.

1. both A and R are true and R is the correct explanation of A
2. both A and R are true and R is not the correct explanation of A
3. assertion is false but reason is true
4. assertion is true but reason is false

In a supermarket, Avantika could easily push an empty trolley but found it difficult to push a trolley full of groceries. The loaded trolley accelerated very slowly even when the same force was applied. To keep the trolley moving, she had to apply a greater force.

(a) Why did the loaded trolley accelerate less?

(b) According to you, which law of motion explains this observation?

(c) Why did Avantika have to apply a greater force to the loaded trolley?

(d) Correlate this event with one other similar example from daily life.