Velocity

Q.

Is acceleration zero at the highest point?

Q.

A particle moving in a straight line covers half the distance with a speed of $3m{s}^{-1}$. The other half of the distance is covered in two equal time intervals with the speed of $4.5m{s}^{-1}$ and $7.5m{s}^{-1}$, respectively. The average speed of particles during this motion is

1. $4m{s}^{-1}$

2. $5m{s}^{-1}$

3. $5.5m{s}^{-1}$

4. $4.8m{s}^{-1}$

Q. Rate of change of displacement per unit time is known as:

1. Deceleration
2. Velocity
3. Speed
4. Acceleration

Q. The the ratio velocity of two object A and B is 1 ratio 3 if the position time graph a graph of object is inclined to time Axis at 30^° and the position time graph of object be is inclined to time Axis at

Q.

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

1. S = D × T

2. T = S/D

3. S = D/T

4. S = T/D

Q.

A cheetah, the fastest of all land animals over a short distance, accelerates from rest to $26m/s$. Assuming that the acceleration is constant, find the average speed of the cheetah.

Q.

Explain me what is velocity of sound and also give me the define of velocity and what is difference between velocity and speed

Q.

Which of the following three is travelling the fastest?

1. A

2. B

3. C

4. All are at same speed

Q.

A car, starting from rest, has a constant acceleration ${\mathrm{a}}_1$ for a time interval ${\mathrm{t}}_1$ during which it covers a distance ${\mathrm{s}}_1$ . In the next time interval ${\mathrm{t}}_2$, the car has a constant retardation ${\mathrm{a}}_2$ and comes to rest after covering a distance ${\mathrm{s}}_2$ in time ${\mathrm{t}}_2$. Which of the following is correct?

1. $\frac{{\mathrm{a}}_1}{{\mathrm{a}}_2}=\frac{{\mathrm{s}}_1}{{\mathrm{s}}_2}=\frac{{\mathrm{t}}_1}{{\mathrm{t}}_2}$

2. $\frac{{\mathrm{a}}_1}{{\mathrm{a}}_2}=\frac{{\mathrm{s}}_2}{{\mathrm{s}}_1}=\frac{{\mathrm{t}}_1}{{\mathrm{t}}_2}$

3. $\frac{{\mathrm{a}}_1}{{\mathrm{a}}_2}=\frac{{\mathrm{s}}_2}{{\mathrm{s}}_1}=\frac{{\mathrm{t}}_2}{{\mathrm{t}}_2}$

4. $\frac{{\mathrm{a}}_1}{{\mathrm{a}}_2}=\frac{{\mathrm{s}}_2}{{\mathrm{s}}_1}=\frac{{\mathrm{t}}_2}{{\mathrm{t}}_1}$

Q.

A car accelerates at $1.5m/s^2$ on a straight road. How much is the increase in velocity in 4 s?

1. 6 m/s

2. 4 m/s

3. 3 m/s

4. 1 m/s

Q. How fast does light travel?

Q.

Which of the following position-time graphs represents a constant velocity motion?

The position is represented by 'x' and time is represented by 't'.

1. 

2. 

3. 

4. 

Q.

A 200m long train has to cross a platform which is 500m long. If the train is traveling at a speed of 70m/s, how long will the train take to cross the platform?

1. 10

2. 20

3. 30

4. 40

Q. A car moving with initial velocity of $15m{s}^{-1}$ accelerates at the rate of $4m{s}^{-2}$. What is the final velocity of the car after $10s$?

1. $65m{s}^{-1}$
2. $55m{s}^{-1}$
3. $70m{s}^{-1}$
4. $40m{s}^{-1}$

Q.

A body, moving with a constant velocity of $10m/s$ for 2 seconds, has a displacement of 'A' metres. Afterward, it accelerates at $10m/s^2$ for 2 seconds covering a displacement of 'B' metres. The ratio of B: A is

1. 4 : 3

2. 5 : 1

3. 2 : 1

4. 1 : 2

Q.

An object starts from rest and attains a uniform acceleration of $4m{s}^{-2}$. What will be its velocity at the end of half a metre?

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

2. $4m{s}^{-1}$

3. $6m{s}^{-1}$

4. $8m{s}^{-1}$

Q.

A car is moving with a constant speed of $50km/hr$. Time taken $t$ to travel $200km$ is

1. $t=6h$

2. $t=2h$

3. $t=5h$

4. $t=4h$

Q.

A bus starting from Bengaluru covers a distance of 300 km in 6 hours on Friday evening, and returns to Bengaluru in 4 hours early next morning. Find its average speed.

Q.

A car travelling at 30m/s , accelerates at the rate10$m/s^2$ for 4 seconds. The final velocity after 4 second will be( in m/s)

1. 30

2. 100

3. 96

4. 70

Q.

$36km/hr$ = _______$m/s$

1. $10$

2. $15$

3. $20$

4. $5$

Q.

The following graph represents the motion of an object. The object is ___.

1. in non-uniform motion

2. in circular motion

3. in uniform motion

4. at rest

Q.

Can you suggest the kind of motion of a body from the following displacement time graphs?

Q.

Write the difference between speed and velocity?

Q.

Average velocity can be calculated by taking the average of initial and final velocities for a given time interval irrespective of the type of acceleration.

1. True
2. False

Q.

A quantity is measured to be $-20\mathrm{m}/\mathrm{s}$. Is it speed or velocity? Give reasons.

Q.

Comment on the type of motion represented by the displacement-time graphs. What conclusion can we draw from this graph?

Q. A car travels from point 'A' to point 'B' which are $160km$ apart in $3\text{hours}$. The car comes back to point 'A' in $2\text{hours}$. Calculate the average speed of the car.

1. $0km{h}^{-1}$
2. $8km{h}^{-1}$
3. $16km{h}^{-1}$
4. $64km{h}^{-1}$

Q.

Velocity and speed are not comparable units.

1. True

2. False

Q.

Brakes are applied to a truck to produce an acceleration of $–10m/s^2$​. If the truck takes $5s$ to stop after applying the brakes, the distance covered by the truck before coming to rest is $250m$.

1. False

2. True

Q. Body A is moving faster than a body B, if it covers less distance than B in the same amount of time.

1. False
2. True