Physicsmedium · Past Paper
If a car travels 100km at 40km/h and the next 100km at 60km/h, the average speed is:
A50 km/h
B48 km/h
C52 km/h
D45 km/h
✓ Correct Answer: B — 48 km/h
Time1=100/40=2.5h, Time2=100/60=1.67h. Avg speed = 200 / 4.17 ≈ 48 km/h.
Share this question
More from Physics
- The change in direction of a ray of light when it enters from a rarer medium to a denser medium is:
- A body moving with a speed of 36 km/h is moving with how many m/s?
- The value of Universal Gravitational Constant (G) is:
- A body is projected vertically upwards. If t1 and t2 are times at which it is at height h while ascending and descending respectively, then h is:
- An object is thrown upwards with a velocity of 19.6 m/s. How long will it take to reach the top? (g = 9.8 m/s^2)