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Motion in Straight Line

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CBSE Gujarat Board Haryana Board

## Previous Year Papers

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Class 10 Class 12

The x and y coordinates of the particle at any time are x = 5t – 2t2 and y = 10t respectively, where x and y are in meters and t in seconds. The acceleration of the particle at t = 2 s is

• 0

• 5 m/s2

• -4 m/s2

• –8 m/s2

C.

-4 m/s2

x = 5t – 2t2    y = 10t

Acceleration of particle at t = 2 s is = –4 m/s2

x = 5t – 2t2    y = 10t

Acceleration of particle at t = 2 s is = –4 m/s2

1927 Views

What is motion?

When an object changes it's position with time, with respect to it's surroundings, the object is said to be in motion.
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Is absolute rest or absolute motion possible?

Absolute rest and absolute motion is not possible because there is no point in the universe which is at rest and can be taken as point of reference. The planet Earth is in continuous motion.
1986 Views

What is rest?

When an object does not change its position with time, with respect to it's surroundings. In such a case the object is said to be at rest.
1215 Views

Can a body be always at rest in some frame?

Yes, a body is always at rest in a frame which is fixed with the body itself.
746 Views

What is the most essential thing to study the motion of a body?

The most essential thing to study the motion is reference frame. Rest and motion are relative terms. It means that an object in one situation can be in rest but in another situation, the same object will be in motion.
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