Motion and Time

The distance time graph is a straight line when

1. An object changes its speed frequently
2. An object changes its direction frequently
3. An object is in rest position
4. An object moves with a constant speed

A dog is running at a speed of 36 km/h. Its speed in m/s will be

1. 10
2. 3.6
3. 100
4. 360

Pendulum is used in

1. Water clocks
2. Pendulum clocks
3. Sundials
4. All of them

Unit of speed is

1. m/s
2. m/min
3. km/h
4. All of them

The to and fro motion is an example of

1. Circulatory motion
2. Oscillatory motion
3. Periodic motion
4. Both Oscillatory and Periodic motion

The total time taken by a vehicle to cover the total distance is given by

1. Total time taken = total distance covered / average speed
2. Total time taken = average speed / total distance covered
3. Total time taken = total distance covered / speed
4. Total time taken = total distance covered

The distance-time graph can be used to find

1. Distance moved by an object at any instant of time
2. Speed of the object
3. Distance moved by an object during definite time intervals
4. All of these

If the distance-time graph is a straight line, it indicates

1. The speed of the object keeps changing
2. The object is moving with a constant speed
3. The object is not moving
4. None of these

Speed is directly measured by using device called

1. Odometer
2. Speedometer
3. Both Odometer and Speedometer
4. None of these

Basic standard unit of time is a

1. Second
2. Hour
3. Minute
4. All of these

Quartz clocks

1. Have an electric circuit with one or more cells
2. Shows more accurate time than the clocks available earlier
3. Have a pendulum
4. Are more accurate because they have an electric circuit with one or more cells

The time period of a simple pendulum does not change if the displacement of bob is slightly changed.

1. The statement is not always true
2. The statement is always true
3. The statement is sometimes true
4. The statement is absolutely wrong

Time period is measured by

1. Releasing the bob from its extreme position and not pushing it
2. Counting the oscillations when the bob is on the extreme
3. Noting time taken to complete about 20 oscillations and dividing it by the number of oscillations
4. All of these

Time period is defined as

1. The time taken to complete one revolution
2. The time taken to go from one extreme to the other
3. The time taken to return to mean position from the extreme on one side only
4. All of these

An oscillation is said to be complete when

1. The bob of pendulum starts from its mean position
2. Moves to extreme on one side and goes to the extreme on the other side
3. Returns to its original mean position
4. The bob starts from mean position, goes to both extremes and returns to mean position

Periodic motion is also known as

1. Rectilinear motion
2. Circular motion
3. Non uniform motion
4. Oscillatory motion

A simple pendulum consists of

1. Small metallic ball - bob only
2. A string only
3. Small metallic ball suspended from a rigid stand by a string
4. None of these

The most common example of periodic motion is

1. Digital clock
2. Simple Pendulum
3. Moving car
4. Movement of a pedestrian

Periodic motion is the motion which

1. Repeats itself after a regular interval of time
2. Repeats itself after indefinite time
3. Does not repeat itself
4. Takes same time

Time intervals shorter than a day can be measured by using

1. Clock
2. Watch
3. Stop Watch
4. Clock, watch or stop watch

A year was fixed as the time taken by

1. The earth to complete one revolution around its axis
2. The earth around the sun
3. The moon around the earth
4. The satellite around the earth

The time between one new moon to the next can be called a

1. Month
2. Year
3. Day
4. Interval

The time between one sunrise and the next is known as a

1. Month
2. Year
3. Day
4. Interval

If the speed of an object moving along a straight line keeps changing

1. The motion is said to be a uniform motion
2. The motion is said to be a non uniform motion
3. The object is said to be stationary
4. The motion is said to be a fast motion

If a car is moving with a speed of 45 kilometers per hour, it implies that

1. It will cover a distance of 45 metres in one minute
2. It will cover a distance of 45 kilometers in one hour
3. It will cover a distance of 45 miles in one hour
4. It is moving with a constant speed of 45 kilometers per hour

In a uniform motion

1. Average speed is the same as the actual speed
2. The object is moving along a straight line
3. The object is moving at a constant speed
4. All the three statements are true

Average Speed is the total distance covered

1. Divided by distance traveled in one hour
2. Multiplied by the total time taken
3. Divided by the total time taken
4. All of these

Speed can be defined as the

1. Distance traveled in unit time
2. Distance traveled
3. Distance traveled by light
4. None of these

Slower moving vehicle will have

1. Higher Speed
2. Lower Speed
3. Equal Speed
4. More Distance

A faster moving object covers

1. Less distance in more time
2. More distance in more time
3. Less distance in shorter time
4. More distance in shorter time

Three types of motion are

1. Circular, Rotational, Vibratory
2. Rectilinear, Circular, Periodic
3. Uniform, Periodic, Circular
4. Non uniform, Periodic, Temporary