Average Speed

Q.

The odometer of the car reads $2000\mathrm{Km}$ at the start of the trip and $2400\mathrm{Km}$ at the end of the trip. If the trip took $8\mathrm{H}$, Calculate the average speed of the car in ${\mathrm{kmh}}^{-1}$ and ${\mathrm{ms}}^{-1}$.

Q.

Abdul, while driving to school, computes the average speed for his trip to be $20km/hr$. On his return trip along the same route, there is less traffic and the average speed is $30km/hr$. What is the average speed for Abduls trip?

Q.

72 km/h = ___m/s.

Q.

A car takes $5hours$ to cover a distance of $400km.$ What is the average speed of the car?

Q.

A 60 m long train moving with constant velocity on a straight level track passes a pole in 5 s, find the speed of the train and the time it will take to cross a 540 m long bridge.

1. 13 m/s, 40 s

2. 25 m/s, 30s

3. 15 m/s, 65 s

4. 12 m/s, 50s

Q.

What are the characteristics of a body in uniform motion along a straight line?

1. The speed of the body must be constant

2. The speed of the body must change

3. The body travels unequal distances in unequal intervals of time.

4. The body travels equal distances in equal intervals of time.

Q.

Your bus is leaving the stop, accelerating at a constant rate of $1m{s}^{-2}$ . When the bus leaves the stop with zero velocity you are $20m$ behind it. With what minimum constant speed you must run to catch the bus? If you run at a speed more than the minimum speed, then analyse the situation.

Q.

Ram went to Chandigarh, which is $250km$ from Delhi. He started from Delhi at $6a.m$ and reached Chandigarh at $11.00am$. Find the average speed by which he traveled from Delhi to Chandigarh.

Q.

Speed could have been represented as $\frac{\text{Time}}{\text{Length}}$.

1. True

2. False

Q. A boy walks to his school at a distance of 6 kilometre with constant speed of 25 KM walk back with a constant speed of 75 kilometre per hour. His average speed for round trip expressed in kilometre per hour??

Q.

Harish ran a certain distance faster than Suresh. Which of the following fundamental physical quantity/quantities is/are useful for comparing their speeds?

1. Both distance and time

2. Either distance or time

3. Only distance

4. Only time

Q.

A body travels 12 cm in the first two seconds and 24 cm in the next four seconds. What is the average speed of the body for the entire journey?

1. 5 cm/s

2. 7 cm/s

3. 8 cm/s

4. 6 cm/s

Q.

A body travels 200 cm in the first two seconds and 220 cm in the next four seconds. What is the average speed of the body for the entire journey?

1. $0.5m{s}^{-1}$

2. $0.7cm{s}^{-1}$

3. $0.7m{s}^{-1}$

4. $0.8cm{s}^{-1}$

Q. If the speed of a body is 5 m/s. Find the time it would take to cover a distance of 6 km.

1. $1h$
2. $\frac{1}{3}h$
3. $\frac{2}{3}h$
4. $\frac{1}{5}h$

Q.

While jogging on a straight road, Ann covers 300 m towards east in 2 minutes 50 seconds. Then, she turned around and jogs for 1 minute covering a distance of 100 m. Calculate average speed and average velocity.

Q. The weight of a person is $60kg$. If he gets ${10}^5$ calories heat through food and the efficiency of his body is $28\%$ then upto how much height he can climb when he use entire energy gained in climbing.

1. $100m$
2. $200m$
3. $400m$
4. $1000m$