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Motion In Straight Line

Question
CBSEENPH11026204
Wired Faculty App

The area of the acceleration-displacement curve of a body gives

  • impulse

  • change in momentum per unit mass

  • change in KE per unit mass

  • total change in energy

Solution

C.

change in KE per unit mass

Area of the acceleration-displacement curve gives change in KE per unit mass.

       12m v2 - u2 = F s = mdvdt × s∴ change in KEMass  = mdvdt × sm     ⇒  change in KEMass = dvdt ×s

Some More Questions From Motion in Straight Line Chapter

Can a body be always at rest in some frame?

Can a body be in motion in the frame associated with the body itself?

When an object in motion can be considered as particle or point object?

Can you think of physical phenomena involving the moon in which moon cannot be treated as particle?

A train is crossing the bridge. Can it be taken as a particle?

Can a train be taken a particle? Give an example in support of your answer.

 A particle is moving along curved line in space. Is the motion one dimensional?

State which of the following are examples of one, two or three dimensional motion: 

(a) A kite flying in the sky.

(b) The earth revolving around the sun. 

(c) A train moving along the equator of the earth in clockwise direction. 

(d) Accelerated motion of a particle in a straight line.

Define distance.

Define displacement.

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