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Motion In Straight Line

Question
CBSEENPH11020577
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The height at which the weight of a body becomes 1/16th, its weight on the surface of earth (radius R), is

  • 5R

  • 15 R

  • 3R

  • 4R

Solution

C.

3R

As space given space in space question comma fraction numerator GMm over denominator left parenthesis straight R plus straight h right parenthesis squared end fraction space equals space 1 over 16 GMm over straight R squared fraction numerator 1 over denominator left parenthesis straight R plus straight h right parenthesis squared end fraction space equals space fraction numerator 1 over denominator 16 straight R squared end fraction Or space fraction numerator straight R over denominator straight R plus straight h end fraction space equals 1 fourth Or space fraction numerator straight R plus straight h over denominator straight R end fraction space equals space 4 straight h space equals space 3 straight R

Some More Questions From Motion in Straight Line Chapter

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.

Can magnitude of displacement be greater than distance travelled by particle?

A body is thrown with a velocity of 9.8 m/s in the vertical upward direction. What is the velocity after one second?

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