# Average Speed

## Trending Questions

**Q.**

What is the time taken by the light to travel from the Sun to the Earth?

8 minutes

10 minutes

15 minutes

3 minutes

**Q.**

What is the S.I. unit of speed?

km

km/s

km/h

m/s

**Q.**

What are the speedometer and odometer?

**Q.**

What is speed

**Q.**

Please explain why we multiply with 18/5 to convert m/s into km/h

**Q.**A body travel 200cm in the first 2s and 220cm in 5s. Calculate the velocity at the end of the seventh second from start

**Q.**

_______ is the SI unit of speed.

**Q.**

How do you determine the speed of a moving vehicle?

**Q.**

A car moves at a speed of $54km/hr$. What is the speed of the car in metres per second?

**Q.**If the speed of a car is 5 ms−1, what is the speed in km h−1?

- 18

**Q.**Odometer measures

**Q.**A truck moves a distance of 50 km. It covers first half of the distance at speed of 200m/s and second half at speed v. if average speed of truck is 100 m/s then what is the value of v?

**Q.**a) Renna walks a distance of 2 km in 40 minute. Find her speed.

b) If the girl walk back and covers the same distance in 50 minute. What is the average speed of the girl.

**Q.**

What is an Odometer and where is it commonly found? [2 MARK]

**Q.**

Why thunder is heard a few seconds after the flash is seen?

**Q.**A car travels 36 km in 2 hours. Its average speed is:

- 18 m/s
- 36 m/s
- 5 m/s
- None of these

**Q.**The speed of the vehicle is measured using a/an ________and the distance travelled can be measured using a/an_________.

- odometer, speedometer
- speedometer, galvanometer
- speedometer, odometer
- galvanometer, odometer

**Q.**

How can speed be calculated?

**Q.**

How long a train will take to travel a distance of 200 km with a speed of 60 kmh-1

**Q.**

The odometer of a vehicle has an initial reading of 22256 km. After the trip, it shows a reading of 22356 km. If the time taken for the trip is 5 hours, find the average speed of the vehicle.

20 km/h

30 km/h

40 km/h

50 km/h

**Q.**

A man swims a length of 100 m in still water with a speed of 1.2 m/s and returns the same length with a speed of 0.8 m/s. What is the average swimming speed of a man? What is his net velocity?

**Q.**

When the speed remains constant, the distance travelled is _____ proportional to the time.

**Q.**

Explain derived quantity.

**Q.**

The S.I unit of speed is

$cm{s}^{-1}$

$m{s}^{-1}$

$km{h}^{-1}$

$newton$

**Q.**A boy walks 10 km in 20 minutes. What is his speed in kmph?

- 20 kmph
- 30 kmph
- 40 kmph
- 10 kmph

**Q.**

If the speed of a body is 5m s−1, then the time it would take to cover a distance of 6 km is:

1/3 hour

2/3 hour

1/5 hour

1 hour

**Q.**

If a train covers 50 km in 2 hours, how much time would it take to cover 100 km?

4 hours

8 hours

6 hours

2 hours

**Q.**

Express the following speed in $m/s$ (metres per second):

$12.6km/hr$

**Q.**If a car covers 70 km in the first hour and 100 km in the second hour. Then what is the average speed of the car for the entire journey?

- 56 km/h
- 85 km/h
- 93 km/h
- 72 km/h

**Q.**

Distinguish between speed and velocity. State their CGS and SI units.