The engine of a car provides a forward force of $1240\ \mathrm{N}$ and the total resistive force on the car is $800\mathrm{N}$. If the mass of the car i...

Assessment: WAEC SSCE - Physics - 2022 (Objective) Subject: Physics

Question 1 Report

The engine of a car provides a forward force of $1240\ \mathrm{N}$ and the total resistive force on the car is $800\mathrm{N}$. If the mass of the car is $1220\ \mathrm{kg}$, determine the distance the car has to travel from the rest before acquiring a speed of $4\ \mathrm{m\ s^{-1}}$.

44.0 m

22.2 m

11.1 m

5.5 m

Answer Details

Acceleration[a] = $\frac{[f o r w a r d - r e s i s t i v e] f o r c e}{m a s s}$

a = $\frac{1240 - 800}{1220}$ → $\frac{440 - 800}{1220}$

a = 0.36m/s $^{2}$ , v = 4m/s, s = ?

Second equation of motion:

s is distance
u is initial velocity
v is final velocity
a is acceleration

v $^{2}$ = u $^{2}$ + 2as

4 $^{2}$ = 0 $^{2}$ + 2 * 0.36 * s

16 = 0.72s

22.2m = s

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The engine of a car provides a forward force of \(1240\ \mathrm{N}\) and the total resistive force on the car is \(800\mathrm{N}\). If the mass of the car i...

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The engine of a car provides a forward force of \(1240\ \mathrm{N}\) and the total resistive force on the car is \(800\mathrm{N}\). If the mass of the car i...

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