Speed vs. Velocity

Q. A 200 m long train crosses a 400m Bridge with a velocity of 36 km per hour. find the time taken by the train to cross the bridge

Q.

The total path length covered by an object is known as___

1. displacement

2. distance

3. velocity

4. speed

Q. The following plot depicts the change in the velocity of a body with time.

Which of the following statements regarding the plot is true?

1. The acceleration of the body after $\text{L}$ is zero.
2. The acceleration of the body in region $\text{OK}$ is decreasing.
3. The acceleration of the body after $\text{L}$ is infinite.
4. The acceleration of the body in region $\text{KL}$ is increasing.

Q.

define the following

1 Distance

2 Displacement

3 scalar

4 vector

5 speed

6 velocity

Q. A car travels on paths A, B and C within the same time and has velocities ${\text{V}}_{\text{A}}$, ${\text{V}}_{\text{B}}$ and ${\text{V}}_{\text{C}}$ respectively on each path. These paths pass through a group of equally spaced lines. Pick the correct ranking of velocities.

1. ${\text{V}}_{\text{A}}$ = ${\text{V}}_{\text{B}}$ = ${\text{V}}_{\text{C}}$
2. ${\text{V}}_{\text{A}}$ > ${\text{V}}_{\text{B}}$ > ${\text{V}}_{\text{C}}$
3. ${\text{V}}_{\text{A}}$ < ${\text{V}}_{\text{B}}$ < ${\text{V}}_{\text{C}}$
4. ${\text{V}}_{\text{A}}$ < ${\text{V}}_{\text{B}}$ > ${\text{V}}_{\text{C}}$

Q.

A boat is rowed across the river at the rate of 4.5km/hr. The river flows at the rate of 6km/hr. The velocity of boat in m/s is

1)2.9

2)3.1

3)2.1

4)5

Q.

An insect moves along a circular path of radius 10 centimetre with a constant speed. It takes one minute to move from a point on the path to a diametrically opposite point. Find- A. the distance covered. B. The displacement C. The average velocity

Q. Two swimmers leaves point A on one bank of river to reach the Point B just opposite to A on the other bank. One of them crosses the river along the straight line A B while the other swims right angeled to the stream and then walk the distance that has been carried away by the stream to get to the point B. What was the velocity u of the walking if both of them reach there simultaneously. Velocity of river is 2.5kmph velocity of swimming is 2.5kmph

Q.

A train travels from Station A to Station B covering 200 km and returns to Station A in 10 hours. The speed and the velocity of the train are _____ and _____, respectively.​

1. 40 km/hr, 0​
2. 20 km/hr, 20 km/hr​
3. 0, 40 km/hr​
4. 40 km/hr, 40 km/hr​

Q. A body goes from C to D with a velocity of $20m{s}^{-1}$ and comes back from D to C with a velocity of $30m{s}^{-1}$. The average velocity of the body during the whole journey is _______.

1. $25m{s}^{-1}$
2. $0$
3. $20m{s}^{-1}$
4. $21m{s}^{-1}$

Q. The odometer of a vehicle has an initial reading of $22256\text{km}$. After the trip, it shows a reading of $22356\text{km}$. If the time taken for the trip is $5$ hours, what is the average speed of the vehicle?

1. $30\text{kmph}$
2. $40\text{kmph}$
3. $50\text{kmph}$
4. $20\text{kmph}$

Q. The velocity$-$time plot for a particle moving on a straight line is shown in the figure:

Calculate the average speed of the particle in the time interval $10-20\text{s}$.

1. $20\text{m/s}$
2. $-20\text{m/s}$
3. $10\text{m/s}$
4. $-10\text{m/s}$

Q.

It was a rainy day in Bangalore. Rohit was sitting besides the window when he saw a lightning. He started his stop watch. He found that after $22$ seconds of lightning its roaring was heard. Calculate the height of the clouds which caused this lightning. Given, speed of light = $3\times {10}^8$ $m{s}^{-1}$ and speed of sound = $340m{s}^{-1}$.

1. $10km$
2. $5km$
3. $8.5km$
4. $7.5km$

Q. A bas appear to move northward at a speed of 203 km per hour to a man driving his car eastwards with speed 20 km per hour .find the velocity of bus with respect to ground (with angle).

Q.

Calculate the number of oscillations a simple pendulum does in $2$ minutes if its time period is $0.5s$.

1. $120$
2. $240$
3. $360$
4. $480$

Q. If velocity = bx*x where b=constant and x= displacement. Then find displacement (x)in terms of time (t) if at t=0 displacement is 0

Q. Choose the correct statement.

1. The average velocity of a moving body cannot be zero.
2. The average velocity of a moving body can 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. 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. $16km{h}^{-1}$
2. $64km{h}^{-1}$
3. $8km{h}^{-1}$
4. $0km{h}^{-1}$

Q. By walking at $\frac{3}{4}th$ of his usual speed, a man reaches office 20 minutes later than usual. What is his usual time?

1. 30 minutes
2. 60 minutes
3. 70 minutes
4. 50 minutes

Q. Which among the following statement is false?

1. If average velocity is zero, then its average speed need not be zero.
2. If speed is zero, then its velocity must also be zero.
3. If speed is constant, then its velocity must also be constant.
4. If velocity is constant, then its speed must also be constant.

Q. A person ran to the top of the hell with the pace of 6 miles per hour it took the exactly same path to turn back his average speed Rose to 14 miles per hour he took exactly one hour to complete his journey find the distance of covered by him in a side

Q. A $60m$ long train moving on a straight level track passes a pole in $5s$. Find the speed of the train and the time it will take to cross a $540m$ long bridge.

1. $13m{s}^{-1}$, $40s$
2. $25m{s}^{-1}$, $30s$
3. $12m{s}^{-1}$, $50s$
4. $15m{s}^{-1}$, $65s$

Q. A car takes $4hours$ to travel from Bangalore to Chennai, whereas the flight takes only $30minutes$ to travel from Bangalore to Chennai. If the distance from Bangalore to Chennai by road is $400km$ and by air is $150km$, find the average speed of flight and average speed of car in the same order.

1. $300km{h}^{-1},150km{h}^{-1}$
2. $300km{h}^{-1},120km{h}^{-1}$
3. $300km{h}^{-1},100km{h}^{-1}$
4. $300km{h}^{-1},200km{h}^{-1}$

Q. A boy starts from a point $O$ and travels $50m$ in $30s$. He returns back to the same point $O$ in $20s$. Calculate the average velocity of the boy.

1. $0m{s}^{-1}$
2. $1m{s}^{-1}$
3. $5m{s}^{-1}$
4. $2m{s}^{-1}$

Q. A car travels from Bangalore to Mumbai and returns in $20hours$. What is the average velocity and average speed of the car if odometer reading of the car, when it started was $2200km$ and when finished was $3800km$?

1. $\text{Average velocity = 0 kmph}$
   $\text{Average speed = 0 kmph}$
2. $\text{Average velocity = 0 kmph}$
   $\text{Average speed = 80 kmph}$
3. $\text{Average velocity = 80 kmph}$
   $\text{Average speed = 80 kmph}$
4. $\text{Average velocity = 80 kmph}$
   $\text{Average speed = 0 kmph}$

Q. John covered a part of his journey at $20\text{kmph}$, and the remaining part at $70\text{kmph}$. He took a total of $8\text{hr}$ to cover a distance of $400\text{km}$. For how much time did he travel at $20\text{kmph}$?

1. $4\text{hr}$ and $12\text{min}$
2. $3\text{hr}$ and $20\text{min}$
3. $3\text{hr}$ and $12\text{min}$
4. $4\text{hr}$ and $40\text{min}$

Q. The velocity of water in a river is 2kmph, while width is 400m. A boat is rowed from a point rowing always aiming opposite point at 8kmph of still water velocity. On reaching the opposite bank the drift obtained is