Physicsmedium · Past Paper
How long will it take for a car to increase its speed from 36 km/h to 72 km/h with an acceleration of 2 m/s^2?
A5 s
B18 s
C10 s
D2 s
✓ Correct Answer: A — 5 s
u = 10 m/s, v = 20 m/s. t = (20 - 10) / 2 = 5 s.
Share this question
More from Physics
- A train starts from station A with acceleration 0.5 m/s^2 and then retards at 1 m/s^2 to stop at station B. If total time is 30s, distance AB is:
- When a wave reflects from a rigid boundary, there is a phase change of:
- A ray of light is incident at 60 degrees on one face of an equilateral prism. If it suffers minimum deviation, the angle of refraction inside the prism is:
- What is the effect on upthrust if the density of the liquid increases?
- What is the speed of sound in air at 25 degrees Celsius, assuming it is 332 m/s at 0 degrees Celsius?