Physics, asked by kashol123, 1 year ago

A car has mass m. A person needs to push the car with force F in order to give the car acceleration a. The person needs to push the car with force 2F in order to give the car acceleration 3a.
Which expression gives the constant resistive force opposing the motion of the car? A ma B 2ma C 3ma D 4ma

Answers

Answered by writersparadise
16
The correct answer is the option A - ma.

Solution:

Resultant force = Applied force – Resistive force


ma = F - R


R = F- ma


3ma = 2F – R


R = 2F – 3ma


By substituting R as above,


2F – 3ma = F – ma


F = 2ma


Therefore, R = 2ma – ma = ma


Resistive force = ma

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