Question on: JAMB Physics - 2022
A car starts from rest and covers a distance of 40 m in 10 s. Calculate the magnitude of its acceleration.
A
3.20 ms\(^{-2}\)
B
0.25 ms\(^{-2}\)
C
0.80 ms\(^{-2}\)
D
4.00 ms\(^{-2}\)
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Correct Option: C
Here's how to calculate the acceleration:
1. **Identify the knowns:**
* Initial velocity (u) = 0 m/s (since the car starts from rest)
* Distance (s) = 40 m
* Time (t) = 10 s
2. **Choose the appropriate kinematic equation:** We can use the equation: s = ut + (1/2)at²
3. **Substitute the values and solve for acceleration (a):**
* 40 = (0)(10) + (1/2) * a * (10)²
* 40 = 0 + 50a
* a = 40 / 50
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