Question

Two persons manage to push a motorcar of mass 1,200kg at a uniform velocity along a level road. The same motorcar can be pushed by three persons to produce an acceleration of 0.2m s^-2. With what force does each person push the motorcar?

[Assume that all persons push the motorcar with the same muscular effort.]​

Answer 1

$\bold {\huge {Answer :-}}$

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Given→

⇨ Mass of the car (m) = 1200 Kg

✭According to question only two people are able to move the car, so the Acceleration acquired by car is given by third the person.✭

⇨ Acceleration produced by car when pushed by third person (a) = 0.2 m/s²

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Since, we know

$\bf\huge\boxed{F=ma}$

Force applied by third person (F) = ma

⇒F = 1200 × 0.2

⇒F = 240 N

➛according to question all persons pushing the motorcar with the same muscular effort,so the each person applies a force of 240 N

Answer 2

Answer:

Explanation:

Given: The mass of the motorcar is 1200 kg and the acceleration of the motorcar is 0.2 m/s2.

As the two persons manage to push the motorcar at a uniform velocity therefore, the acceleration of the car is due to the force exerted by the third person only.

The force exerted by third person is given as,

F=ma

Where, mass of the motorcar is m and acceleration of the motorcar is a.

By substituting the values in the above equation, we get

F=(1200)(0.2)=240 N

Thus, each person push the motorcar with a force of 240 N