Physicsmedium · Past Paper
A car starts from rest and covers 100m in 5s. What is its acceleration?
A4 m/s^2
B8 m/s^2
C20 m/s^2
D40 m/s^2
✓ Correct Answer: B — 8 m/s^2
s = 0.5at^2 => 100 = 0.5 * a * 25 => a = 200/25 = 8 m/s^2.
Share this question
More from Physics
- A body of mass 1 kg is at a height of 1 m. Its PE is (g=10 m/s^2):
- The velocity of light in two media A and B are 2x10^8 m/s and 2.5x10^8 m/s. The critical angle for light going from A to B is:
- If air resistance is taken into account for a ball thrown upwards, the time of ascent is ______ the time of descent.
- What is the nature of sound waves in air?
- A stone is dropped from a height of 20m. How long does it take to reach the ground? (g=10 m/s^2)