Question

Which of the following equation is equivalent to the mathematical
expression of Newton’s second law of motion?
A. F = mv
B. Ft = mv-mu
C. F= Pv
D. F=a/t

Answer 1

Answer:

Answer is B

Explanation:

We k ow F =ma. So a =v-u/t

F=mv-mu/t

Ft=mv-mu

Answer 2

Given : mathematical expression of   Newton’s second law of motion

To Find : Which of the following equation is equivalent

A. F = mv

B. Ft = mv-mu

C. F= Pv

D. F=a/t​

Solution:

A. F = mv

This Equation is incorrect as P = mv

B. Ft = mv-mu

=> Ft = m(v - u)

=> F = m(v - u)/t

a = (v - u)/t

=> F = ma

F = ma is mathematical expression of   Newton’s second law of motion

Hence Ft = mv-mu is correct

F= Pv    and F = a/t are also incorrect

Ft = mv-mu is  mathematical expression of   Newton’s second law of motion

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