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Q 1.
Define Distance?
Ans.
Path length travelled by a body in a given time intervals.
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Q 2.
What would be the displacement of a particle moving in a circular path of radius r after displacement of half of a circle?
Ans.
2r.
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Q 3.
What can you say about the motion of an object if its speed-time graph is a straight line parallel to time axis?
Ans.
Object is moving uniformly.
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Q 4.
What can you say about the motion of an object whose distance-time graph is a straight line parallel to time axis?
Ans.
Object is in rest.
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Q 5.
What does the parth of an object look like when it is in uniform motion?
Ans.
It is in straight line.
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Q 6.
What does the parth of an object look like when it is in uniform motion?
Ans.
It is in straight line.
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Q 7.
What does the odometer of an automobile measure?
Ans.
Distance travelled by the vehicle.
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Q 8.
What is the speed of sound in air?
Ans.
346 ms-1.
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Q 9.
An objects travels 16m in 4s and then another 16m in 2s. What is the average speed of the object?
Ans.
5.33.
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Q 10.
Formula of average velocity?
Ans.
Initial velocity + final velocity/ 2.
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Q 11.
Formula of average speed?
Ans.
Total distance travelled/ Total time taken.
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Q 12.
Name the simplest type of motion?
Ans.
Straight line.
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Q 13.
Define Displacement?
Ans.
The shortest distance measured from initial to the final position of an object is known as displacement.
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Q 14.
Name the device that is fitted in automobiles to show distance?
Ans.
Odometer.
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Q 15.
Change on velocity per unit time of an objects is called?
Ans.
Acceleration.
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Q 16.
Displacement per unit time of an objects is called?
Ans.
Velocity
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Q 17.
If an object moves in a circular path with uniform speed, its motion is called?
Ans.
Uniform circular motion.
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Q 18.
Motion of a freely falling body is an example of?
Ans.
Uniformly accelerated motion.
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Q 19.
SI unit of acceleration?
Ans.
m s-2.
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Q 20.
SI unit of speed is?
Ans.
Metre per second.
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