Define the terms rest and motion Give one example for each.

2

(a)

Give one examples each for directly and indirectly perceivable motions.

2

(a)

A body moves in a circle of radius '2R' What is the distance covered and displacement of the body after 2 complete rounds?

2

(a)

A body was thrown in the vertically upward direction rises up to a height hand comes back to the position of start. Calculate :
(i) the total distance traveled by the body.
(ii) the displacement of the body.

2

(a)

Define average velocity when the velocity of a body changes at a non-uniform rate and a uniform rate.

2

(a)

Give some points of differences between speed and velocity

2

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Under what conditions is the magnitude of average velocity of an object equal to its average speed?

2

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During an experiment, a signal from a spaceship reached the ground station in five minutes what was the distance of the spaceship from the ground station? The signal travels at the speed of light that is 3 x \(10^{ 8 }ms^{ -1 }\) .

2

(a)

What do you mean by the term retardation? Give two examples of such a motion

2

(a)

Can a body have:
(i) a uniform speed, but still have acceleration
(ii) a zero velocity but still have acceleration? Give an example of each kind.

2

(a)

State a relationship connecting u,v,u and t for an accelerated motion. Give an example of motion in which acceleration is uniform

2

(a)

A train starting from a railway station and moving with uniform acceleration attains a speed 40 km h^–1 in 10 minutes. Find its acceleration.

2

(a)

An object undergoes an acceleration of 10 \(m/s^{ 2 }\) starting from rest Find the distance traveled in 5 seconds.

2

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Mention the uses of a velocity-time graph.

2

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State the S.I unit of speed A girl moves with the speed of 6 km/h for 2 h and with the speed of 4 km/h for the next 3 h find the average speed of the girl and the total distance moved.

2

(a)