Speed

Q. Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 50 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph’s average speeds and velocities in jogging (a) from A to B and (b) from A to C?

Q. Distance travelled per unit time is called ___.

1. velocity
2. acceleration
3. mass
4. speed

Q.

Is time scalar quantity or vector? How?

Q.

define instantaneous speed

Q.

How far will a car travel in $25min$ at $12m/s$?

Q. The length of a pendulum is measured as 20.0cm . The time interval for100 oscillations is measured as 90s with a stop watch of 1s resolution. The accuracy in the determination of g is

Q.

A car is moving at a speed of $30\mathrm{m}/\mathrm{s}$ Find the distance covered by the car in $2\mathrm{s}$

Q.

A car takes 4 hours to travel a distance of 320 km. What is its average speed for the journey?

1. $60km{h}^{-1}$

2. $80km{h}^{-1}$

3. $40km{h}^{-1}$

4. $100km{h}^{-1}$

Q.

A car travels at a speed of 50 $\frac{km}{hr}$ for 30 min, 40 $\frac{km}{hr}$ for the next 15 min, and 60 km/h for the next 60 min. Calculate the average speed of the car

1. 26.12 $\frac{km}{hr}$

2. 34.59 $\frac{km}{hr}$

3. 43.95 $\frac{km}{hr}$

4. 54.29 $\frac{km}{hr}$

Q. The average speed of an object over a given time duration is 6m/s if it travels first half of the duration with a constant speed 4m/s its speed during the next half duration is

Q.

A train passes over a 200 m long bridge in 10 sec. The length of the train is 100 m. The speed of the train is

1. $10\frac{m}{s}$

2. $30\frac{m}{s}$

3. 0.86 $\frac{m}{s}$

4. 1.42 $\frac{m}{s}$

Q.

__ is considered as the basic unit of time.

Q.

The distance travelled by an object in unit time is known as __________.

1. Displacement

2. Time

3. Position

4. Speed

Q.

If a body travels for time t with speed v₁ and then it further travels for time t with speed v₂, find the average speed.

Q.

A train of length 180 m approaches a tunnel of length 620 m. How long will it take the train to pass completely through the tunnel at a speed of 54 km/h?

1. 53.33 seconds

2. 53.33 minutes

3. 5.333 seconds

4. 533 seconds

Q. A car covers 100km in 3 hours, the speed of the car is km/h

1. 32
2. 33.33
3. 34
4. 30

Q. Distance travelled by an object in unit interval of time is known as:

1. Distance
2. Time
3. Displacement
4. Speed

Q.

What kind of motion does the minute hand of a clock show?

1. Rectilinear motion

2. periodic motion

3. non-periodic motion

4. random motion

Q. A car travels a distance of 400 km in 8 hr. Its average speed is:

1. 50 kmph
2. 60 kmph
3. 65 kmph
4. 70 kmph

Q.

What is the speed of a body which is at rest?

1. Position needs to be known to find the speed

2. Definitely zero

3. Definitely non-zero

4. Can be zero or non-zero

Q. A truck covers first $80km$ in $2hours$, and the remaining $60km$ in the next $3hours$. What is the average speed of the truck?

1. $32km{h}^{-1}$
2. $34km{h}^{-1}$
3. $28km{h}^{-1}$
4. $36km{h}^{-1}$

Q. A man walks at a speed of 5 km/hr for 20 minutes. He runs back the same distance at a speed of 20 km/h. How much time does he take to run back?(In minutes)

1. 5

Q.

Which one of the following has the maximum and the least average speed?

1. Sanjeev moving with 12 km/h
2. Rajeev running with 5 m/s
3. Kabir moving with 150 m/min

Q.

Speed of cars is usually measured in the unit ______.

Q.

State true or false:

$Distance=\frac{speed}{time}$

1. True

2. False

Q.

Which of the following physical quantities can be measured in metre per minute?

1. Distance

2. Displacement

3. Time

4. Speed

Q.

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

1. None of these

2. 18 m/s

3. 36 m/s

4. 5 m/s

Q. A car is travelling from point A to point B which are 10 kilometre apart. It takes 2 hours for the car to travel this distance. Speed of the car is ______.

1. $4km/hr$
2. $5km/hr$
3. $5.2km/hr$
4. $3km/hr$

Q.

The odometer of a car reads $2000\mathrm{km}$ at the start of a 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 $\mathrm{km}{\mathrm{h}}^{-1}$ and $\mathrm{m}{\mathrm{s}}^{-1}$.

Q. A boat travels $30km$ in $6hours$. Calculate the speed of the boat.

1. $4km{h}^{-1}$
2. $5km{h}^{-1}$
3. $6km{h}^{-1}$
4. $8km{h}^{-1}$