Question

Choose the correct statement regarding second law of motion?

Statement 1: The law states that whenever a force acts on a particular object, the object will accelerate based on the direction of the force

Statement 2: The law states that as long as the mass of an object is constant, increasing the force exerted onto it will also increase its acceleration

Statement 3: The law states that force remains constant, and then the increase of the mass of the object will cause acceleration to decrease

• A. All statements can be explained by second law of motion
• B. Only statement 2 can be explained by second law of motion
• C. Statement 2 and 3 can be explained by second law of motion
• D. Only statement 1 can be explained by second law of motion.

Answer 1

The correct option is A All statements can be explained by second law of motion

Second law of motion states the following:
$F=m\times a$
Therefore, the object will accelerate based on the direction of the force.
When mass is kept constant, $F\propto a$
i.e, if the mass of the object is constant, then on increasing the force exerted on the object will also increase its acceleration.

$m=\frac{F}{a}$ $\Rightarrow m\propto \frac{1}{a}$, when force is kept constant.
That is, if the force is constant, on increasing the mass leads to the decrease in acceleration.