Motion

Q.

What is the quantity which is measured by the area occupied below the velocity-time graph?

Q.

A body is said to be in motion__.

1. when it changes its position with respect to anything

2. when it changes its position with respect to an observer

3. when it doesn't changes its position

4. when time has passed

Q.

A motorcyclist drives from A to B with a uniform speed of $30km/h$ and returns back with a speed of $20km/h$. Find its average speed.

Q.

You drive a car at a speed of 70 km/hr on a straight road for 8.4 km, and then the car runs out of petrol. You walk for 30 minutes to reach a petrol pump at a distance of 2 km. The average velocity from the beginning of your drive till you reach the petrol pump is?

1. (a) $16.8km/hr$

2. (b) $35km/hr$

3. (c)$64km/hr$

4. (d) $18.6km/hr$

Q. If you are resting inside a car that is moving, are you in rest or motion? Justify your answer. [3 MARKS]

Q.

Convert $75km/hr$ into $m/s.$

Q. $36$ $km/hr$ can also be expressed as :

1. $10m\text{/}s$
2. $3.6m\text{/}s$
3. $324m\text{/}s$
4. $129.6m\text{/}s$

Q.

Name different types of the pendulum.

Q. Which type of motion is executed by simple pendulum?

1. Rotatory motion
2. Rectilinear motion
3. Circular motion
4. Periodic motion

Q.

In a mechanical wristwatch, which part works in the same way as a pendulum in a clock?

Q. Match the type of motion with the respective distance-time graph.

1. Body at rest
2. Non-uniform motion
3. Uniform motion

Q. A person move along the boundary of a square park of side 10m in 40s . What will be the magnitude of displacement of the person at the end of 3 minutes

Q.

If a body is not changing its position with respect to time then it is said to be at rest.

1. True

2. False

Q. Displacement is a vector quantity because it has both magnitude and ___ .

Q.

A car travels $100Km$ east and then $100Km$ south. Finally, it comes back to the starting point by the southeast route. Throughout the journey, the speed is constant at $60Km/h.$ The average velocity for the whole journey if the time is taken is $3.3hours$ is

1. $60Km/hr$

2. $90Km/hr$

3. $0Km/hr$

4. $180Km/hr$

Q.

A body is said to be at ___ if it does not change its position with respect to the reference point.

Q. A car travels from point A to point B which are 160 km apart in 3 hours. The car comes back to point A in 2 hours, then the average velocity of the car in km/h is

1. 64 km/h
2. 32 km/h
3. 24 k/h
4. 0 km/h

Q.

What does the area below velocity – time graph represent?

1. displacement

2. acceleration

3. Average speed

4. Average velocity

Q.

A 100 m long train crosses a 400m bridge with a velocity of 72km/h. calculate the time taken to cross the bridge.

Q.

In five minutes, the distance between a car and a pole changes progressively. What is true about the car?

1. Car is at rest

2. Car is in motion

3. Nothing can be said with this information

4. None of the above

Q.

Which of the following statements is/are correct?

1. Distance is always greater than the magnitude of displacement

2. Distance is always smaller than the magnitude of displacement

3. Distance can never be greater than displacement because it has both direction and magnitude.

4. Distance is greater than or equal to the magnitude of displacement

Q.

Find the distance covered by a car travelling at a constant speed of $60m/s$ in $10s.$

Q. Assume you are travelling in a bus. There is a traffic light in the line of sight of the bus driver. What will be the direction in which the traffic light moves from your point of view?

1. Towards the bus.
2. Away from the bus.
3. Left to the bus.
4. Right to the bus.

Q.

The speed of the car is $55km/hrs$. The distance covered in $yhours$ is ________.

Q.

Is there any objects which is at complete rest in earth since earh is moving?

Q.

What do you understand by the amplitude of a simple pendulum?

Q. Two people X and Y are inside two buses A and B moving in the same direction with the same speed respectively . After 5 min, the speed of the bus A increased to 1.5 times that of B. Then which of the following statements is/are correct?

1. Person X feels that person Y is moving in backward direction after 5 min.
2. Person Y feels that person X is moving in forward direction after 5 min.
3. Person X is at rest with respect to person Y initially.
4. Person Y is in motion with respect to person X initially.

Q.

The velocity of a car is 18m/s. This velocity is equivalent to ___ km/h.

Q. Do we really need time and motion for our day to day life and why?

Q. The speed is constant in a uniform motion.

1. False
2. True