Question
What is the acceleration of a van that starts from rest and attains a speed of 20 ms−1 in 25 s?
Answer: Option B
:
B
Given:
Initial velocity, u=0 ms−1
Final velocity, v=20 ms−1
Time, t=25 s
From the first equation of motion,
v=u+at,
20=0+a×25
⇒a=2025=0.8 ms−2
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:
B
Given:
Initial velocity, u=0 ms−1
Final velocity, v=20 ms−1
Time, t=25 s
From the first equation of motion,
v=u+at,
20=0+a×25
⇒a=2025=0.8 ms−2
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