Speed (Average Speed)

Q.

Question 10
A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is:
(i) 100 km
(ii) 25 km
(iii) 15 km
(iv) 10 km

Q.

The odometer of a car reads 57321.0 km when the clock shows the time 08:30 AM. What is the distance moved by the car, if at 08:50 AM, the odometer reading has changed to 57336.0 km? Calculate the speed of the car in km/min during this time. Express the speed in km/h also.

Q.

the speed of the moving car is 72 km/hr . calculate in m/s.

Q.

Question 4

A bus travels 54 km in 90 minutes. The speed of the bus is

(a) 0.6 m/s

(b) 10 m/s

(c) 5.4 m/s

(d) 3.6 m/s

Q.

Question 15

A spaceship travels 36, 000 km in one hour. Express its speed in km/s

Q.

A car travels a distance of 15 km in 20 minutes find the speed of the car in kilometre per hour and metre per second

Q.

Question 5

If we denote speed by S, distance by D and time by T, the relationship between these quantities is

(a) $S=DT$

(b) $T=\frac{S}{D}$

(c) $S=\frac{1}{T}\times D$

(d) $S=\frac{T}{D}$

Q. A car moving on a straight road is an example of

1. rectilinear motion
2. oscillatory motion
3. rotatory motion
4. periodic motion

Q.

Question 8
Which of the following relations is correct?

1. Speed = $Distance\ast Time$
2. Speed= $\frac{Distance}{Time}$
3. Speed= $\frac{Time}{Distance}$
4. Speed = $\frac{1}{Speed\ast Time}$

Q.

Rohan covers a distance of 10 km by running with a uniform speed of 4.5 km/hr. Sohan runs 1.2 km in 15 minutes. Who runs faster?

Q.

Without actually calculating the cubes, find the value of each of the following: ${\left(28\right)}^3+{(-15)}^3+{(-13)}^3.$

Q.

Without actually calculating the cubes, find the value of the following:

${\left(28\right)}^3+{(-15)}^3+{(-13)}^3$

Q.

Question 19

Distance between Bholu’s and Golu’s house is 9 km. Bholu has to attend Golu’s birthday party at 7 o’clock. He started from his home at 6 o’clock on his bicycle and covered a distance of 6 km in 40 minutes. At that point he met Chintu and he spoke to him for 5 minutes and reached Golu’s birthday party at 7 o’clock. With what speed did he cover the second part of the journey? Calculate his average speed for the entire journey.

Q.

A space ship travells 36000 km/hr. Express its speed in km/s.

Q.

A girl decides to go for shopping. The mall is 5 km from her home. She covers the first 3 km at a speed of 30 km/hr. She is stuck in traffic for 6 minutes and covers rest of the distance at 40 km/hr. How much time did she take to reach the mall? Also, find her average speed. [5 MARKS]

Q.

Question 11
Suppose the two photographs, shown in Fig. 1 and Fig. 2, had been taken at an interval of 10 seconds. If a distance of 100 meters is shown by 1 cm in these photographs, calculate the speed of the blue car.

Q. Question 4
The distance between two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train.

Q.

a train takes 30 minutes to cover a distance of 180 km. calculate its speed

Q.

Is motion relative in nature?

Q. A soldier marches at a speed of 2m/s . What distance will he cover in 1 hour ?

Q.

How do you calculate speed distance and time quickly?

Q.

A car is traveling at a constant speed of $27m/s$. The driver looks away from the road for $2seconds$ to tune in to a radio station on the radio. How far does the car go during this time?

Q. How are speed, distance and time related to each other?

Q.

Which of the following vary inversely with each other?

1. speed and distance covered.

2. distance covered and taxi fare.

3. distance traveled and time is taken.

4. speed and time taken.

Q.

The formula to calculate speed of an object is $Speed=\frac{Dis\tan ce\left(d\right)}{Timetaken\left(t\right)}$..

1. True
2. False

Q.

The value of speed calculated by $\frac{Distance}{Time}$ gives us the average speed over the given time interval.

1. True

2. False

Q. If the speed of a vehicle is said to be $50m{s}^{-1}$ and the time taken to travel a certain distance is 10 s, then find the distance travelled?

1. 500 m
2. 5 m
3. 25 m
4. 50 m

Q. A car travels at a speed of 60 m/s for first 3 seconds and 40 m/s for the next 2 seconds. The total distance (in m) travelled by the car in those 5 seconds is:

1. 260

Q.

A transit train from Boston to New York and a passenger train from New York to Boston departed at the same time, at $3:00\mathrm{PM}$ . The distance between New York station and Boston station is $280\mathrm{miles}$. The speed of the transit train was $80\mathrm{miles}\mathrm{per}\mathrm{hour}$. The speed of the passenger train was $60\mathrm{miles}\mathrm{per}\mathrm{hour}$. At what time will the trains pass each other?

Q.

Question 8

The correct symbol to represent the speed of an object is

(a) 5 m/s

(b) 5 mp

(c) $5m/s^{-1}$

(d) 5 s/m