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Motion In Straight Line

Question

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A particle of mass M is situated at the centre of spherical shell of mass and radius a. Th magnitude of the gravitational potential at a points situated at a/2 distance from the centre, will be

2GM/a

3GM/a

4GM/a

GM/a

Solution

B.

3GM/a

V_P = V_sphere + V_practical

straight V subscript straight p space equals space GM over straight a space plus fraction numerator GM over denominator straight a divided by 2 end fraction straight V space equals space GM over straight a space plus space fraction numerator 2 GM over denominator straight a end fraction straight V subscript straight p space equals fraction numerator space 3 GM over denominator straight a end fraction

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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