science
Grade-9
Easy
Question
The driver of a car moving at a velocity of 50 m/s applies brakes and eventually stops after 10 s. What is the acceleration of the car?
Hint:
- 5 m/s²
The correct answer is: – 5 m/s2
Initial velocity = 50 m/s
Final velocity = 0
Time taken = 10 s
The acceleration = (v – u) / t
= (0 – 50)/ 10
= - 50/10
=– 5 m/s2.
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