Question

A car of mass 800 kg has a forward acceleration of 2.5 m / s2 . A frictional force of 1200 N opposes the motion of the car. What is the driving force due to the engine of the car?
A) 800 N

B) 1200 N

C) 2000 N

D) 3200 N

Answer 1

Answer:

c) 2000

Explanation:

force formula is F=ma

F=800×2.5

F=2000

Answer 2

The correct answer is option (d) 3200 N.

Given,

The mass of the car is 800 kg.

The acceleration of the car is 2.5 m/s².

A frictional force of 1200 N opposes the motion of the car.

To Find,

The driving force due to the engine of the car.

Solution,

The formula for calculating the for on an object is

Force = mass*acceleration

Force = 800*2.5

Force = 2000 N

Now,

The driving force due to the engine = 2000+1200 { because the force of friction is opposing the motion, which will add up in the driving force due to the engine.}

The driving force due to the engine = 3200 N.

Hence, the driving force due to the engine is 3200 N.

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