5. If a 180 kg race car starts a race from rest and gets up to a speed of 125 m/s in 18 s, what is the
force applied by the engine of the racecar?
I

1250N

Explanation:

Th force applied by the engine of this race car can be calculated using the formula: F = m × a

Where, F= force in Newtons (N)

m = mass in kilograms

a= acceleration in m/s^2

The mass of the race car is known (180kg). To find the acceleration (a), we divide the speed or velocity by the time taken i.e. a = v/t

Hence, a = 125/18

a = 6.9444m/s^2.

We can then find the force (F) by saying F= 180 × 6.944444

F = 1250Newtons.

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