Question

According to Newton’s second law of motion, which object will require the most force in order to change its motion?

A.
The one with the greatest mass and fastest speed

B.
The one with the least mass and greatest speed

C.
The one with the greatest mass and lowest speed

D.
The one with the least mass and slowest speed

Answer 1

A. The one with the greatest mass and fastest speed

Step-by-step explanation:

Newton's Second Law of Motion

• F ∝ ma
• F ∝ m(v - u)
• F ∝ mv - mu
• F ∝ ΔP

So, as per the equation the force required to be applied is directly proportional to the change in momentum.

Therefore, we can understand two things :-

1. More mass = more force required
2. Faster speed = more force required

The correct option is A.