PHYSICS HELP!!! How much time is required for the motorcycle to change its speed

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Circuiteer

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from 30 m/s to 40 m/s? A motorcycle has a constant acceleration of 1.9 m/s2. Both the velocity and acceleration of the motorcycle point in the same direction.

(a) How much time is required for the motorcycle to change its speed from 30 m/s to 40 m/s?
s

(b) How much time is required for the motorcycle to change its speed from 56 m/s to 66 m/s?
s
 
u just need to use this equation:
V2=AT+V1
V2 is 40m/s and V1 is 30m/s ans A is 1.9m/s2.because velocity and acceleration of the motorcycle point in the same direction A will be +1.9
so: 40=1.9t+30.......10=1.9t,so t=5.26
it goes the same way with the second question.as u can see velocity itself isn't important.velocity difference matters.
so again:66=1.9t+56.......10=1.9t,so t=5.26
 
Use the following equation to answer your question.

(Vf - Vo) / A

where Vf = final velocity, Vo = original velocity, and A = acceleration.

The final answer to both questions is 5.26 seconds. The change in velocity (10m/s) is the same for both situations as well as the acceleartion... therefore it makes sense that the time would remain the same as well
 
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