Question

A motorcycle stops at a red light and then gains a speed of 12 m/s in 15s. What's its acceleration?

Answer 1

Option a) 0.8 m/s² is the correct answer

the acceleration of the motorcycle is 0.8 m/s²

Given the data in the question;

Since the motorcycle stopped then, initial speed u = 0 m/s

final speed v = 12 m/s

time t = 15 s

acceleration = ?

To get our acceleration, we use the first equation of motion.

This equation states that;

$v = u + at$

so, we simply substitute in our given values

$12 m/s = 0 m/s + ( a * 15s )$

$12 m/s = ( a * 15 s )$

so we find a

$a = \frac{12m/s}{15s}$

$a = 0.8 m/s^2$

Therefore, the acceleration of the motorcycle is 0.8 m/s²

Option a) 0.8 m/s² is the correct answer

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