science
Grade-9
Easy
Question
An athlete running at a velocity of 5 m/s slows down to 2 m/s in 3 seconds. Her acceleration is ___ m/s2.
- 1 m/s2
- – 1m/s2
- 2.3 m/s2
- – 2 .3 m/s2
Hint:
- 1 m/s²
The correct answer is: – 1m/s2
Initial velocity = 5 m/s
Final velocity = 2 m/s
Time taken = 3 s
Acceleration = (v – u)/t
= (2 – 5)/3
=– 1 m/s2.
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