Average Speed

Q. A bus travels a distance of 120km with a speed of 40km/h and returns with a speed of30km/h. Calculat the average speed for the entire journey.

Q. A car travelled a distance of 100 km in 2 hours. What is its average speed?

1. 25 kmph
2. 75 kmph
3. 60 kmph
4. 50 kmph

Q.

A car travels the first half time with a uniform speed u and the next half time with a uniform speed v. Find its average speed.

1. 

2. 

3. 2uv

4. uv

Q.

A car moves with a speed of 40 km/h for the first hour and then with a speed of 60 km/h for the next half hour and finally with a speed of 30 km/h for the next 1.5 hours. What will be the average speed of the car?

​​​​

1. 38 km/h
2. 35 km/h
3. 37 km/h
4. 40 km/h

Q.

Total distance$=\_\_\_\_\_\_\_\_\times$Total time taken

Q.

Joe drives 120 km at 60 kmph, and then he drives the next 120 km at 40 kmph. What is his average speed for the entire trip in kmph?

1. 42

2. 54

3. 48

4. 60

Q. The odometer of a car reads $3000\text{km}$ at the start of a trip and $3400\text{km}$ at the end of the trip. If the trip took $8\text{hr}$, calculate the average speed of the car in ${\text{m min}}^{-1}$.

1. $236.45{\text{m min}}^{-1}$
2. $833.33{\text{m min}}^{-1}$
3. $874.03{\text{m min}}^{-1}$
4. $1500{\text{m min}}^{-1}$

Q. Give one example of a situation in which a body has a certain average speed but its average velocity is zero.

Q.

A car moves 30 km in 0.5 h and the next 30 km in $\frac{2}{3}h$.Calculate the average speed for the entire trip in $\frac{m}{s}$.

Q.

An object travelled 16 m in four seconds and then another 16 meter in two seconds what is the speed of the object?

Q.

If the speed of a moving object is $5kmph$ then, how much distance will it cover in $10$ hours?

1. $50km$
2. $25km$
3. $60km$
4. $40km$

Q. A car travelled from city A to city B and returned back to city A in 30 minutes. The distance between city A and city B is 10 km. The average speed and average velocity of the car will be respectively (in m/s):

1. 11.11, 0
2. 0, 11.11
3. 0, 0
4. 11.11, 11.11

Q. In which of the following graphs, speed is decreasing with time?

1. 
2. 
3. 
4. 

Q.

An object travelled 16 Meter in 4 Second and then another 16 meter in 2 seconds what is the speed of the object ?

Q. Choose the correct statement.

1. The average velocity of a moving body can be zero.
2. The average velocity of a moving body cannot be zero.
3. The average speed of a moving body can be zero.
4. The average speed of a moving body is always less than the average velocity.

Q. The first half of total distance of 50 km is covered in 2 h, and the second half in 3 h. The average speed is ______.

1. 2.78 ms^-1
2. 7 ms^-1
3. 13.8 ms^-1
4. 5.56ms^-1

Q.

An auto travels the first half time with a uniform speed $u$ and the next half time with a uniform speed $v$. Find its average speed.

1. $2uv$
2. $\frac{u+v}{2}$
3. $uv$
4. $\frac{uv}{2}$

Q.

A car takes 4hrs to travel from Bangalore to Chennai whereas the flight takes only 30min to travel from Bangalore to Chennai. If the distance from Bangalore to Chennai by road is 400km and the air is 150km.

Answer in the given order (in $\frac{km}{hr}$ ):

Find the Average Speed of Flight, Average velocity of Flight, Average speed of car, Average velocity of car.

1. 300 , 300, 37.5 , 100

2. 300 , 37.5, 100 , 100

3. 300, 300, 200, 100

4. 300, 300, 100, 37.5

Q. Two objects A and B of masses 50 kg and 100 kg respectively are moving on a rough surface with same speed as shown in figure, then

द्रव्यमान क्रमशः 50 kg तथा 100 kg की दो वस्तुऐं A तथा B चित्रानुसार किसी खुरदरे पृष्ठ पर समान चाल से गतिशील हैं, तब

1. A experiences more frictional force than B
   
   A, B से अधिक घर्षण बल अनुभव करता है
2. B experiences more frictional force than A
   
   B, A से अधिक घर्षण बल अनुभव करता है
3. Both experience same frictional force
   
   दोनों समान घर्षण बल अनुभव करते हैं
4. First A experiences more frictional force and then B experiences more frictional force
   
   सर्वप्रथम A अधिक घर्षण बल अनुभव करता है, तत्पश्चात् B अधिक घर्षण बल अनुभव करता है

Q.

An auto travels the first half time with a uniform speed $u$ and the next half time with a uniform speed $v$. Find its average speed.

1. $\frac{uv}{2}$
2. $2uv$
3. $uv$
4. $\frac{u+v}{2}$

Q.

A girl is cycling and she covers $0.5km$ in $2$ minutes, next $0.75km$ in $3$ minutes and last $1$ km in $4$ minutes. Select the options that correctly mention her average speed.

1. $4.16m{s}^{-1}$

2. $0.25m{s}^{-1}$

3. $0.25kmmi{n}^{-1}$

4. $4.16kmmi{n}^{-1}$

Q.

Calculate the distance travelled by bicycle moving at a speed of $20km/h$ in $2hours$.

Q. The first half of total distance of 50 km is covered in 2 h, and the second half in 3 h. The average speed is ______.

1. 13.8 ms^-1
2. 7 ms^-1
3. 2.78 ms^-1
4. 5.56ms^-1

Q.

An auto travels the first half time with a uniform speed u and the next half time with a uniform speed v. Find its average speed.

1. 2uv

2. uv

3. 

4. 

Q. If the speed of a car is $20m{s}^{-1}$, what is the speed in $km{h}^{-1}$?

1. 72

Q. A train travels from A to B for 30 km at a uniform speed of 30 kmph. Its average speed after traveling another 40 km from B to C is 45 kmph for the whole journey. What was the average speed of the train from B to C?

1. 72 kmph
2. 75 kmph
3. 90 kmph
4. 70 kmph

Q.

A satellite $X$ is launched into a circular orbit of radius $R$ around the earth while a second satellite $Y$ is launched into an orbit of radius $4R$. The ratio of the time periods of $Y$ to $X$ is ______.

1. $1$

2. $4$

3. $8$

4. $16$

Q.

A car takes 4hrs to travel from Bangalore to Chennai whereas the flight takes only 30min to travel from Bangalore to Chennai. If the distance from Bangalore to Chennai by road is 400km and the air is 150km. Calculate the average speed and average velocity of flight and car.

Answer in the given order (in $km/hr$ ):

Find the Average speed of Flight, Average velocity of flight, Average speed of car, Average velocity of car.

1. 300 , 300, 37.5 , 100

2. 300 , 37.5, 100 , 100

3. 300, 300, 200, 100

4. 300, 300, 100, 37.5

Q. Solve Question 82

82. Calculate the distance (in metres) travelled by a body in 4 seconds if it is travelling with a constant speed of 1.5 m/s.

Q. A train passes $300m$ long platform in $30s$ and it crosses a signal on the station in $12s$. Find:
the speed of the train in $km/h$.