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Home Questions X2TDBRU2D5
Target Exam

CUET

Subject

Physics

Chapter

Gravitation

Question:

There is a small hole in a spherical shell of mass M and radius R. A particle of mass m is dropped from point A as shown . Match the two columns for the situation shown in figure.

       
1 Potential energy from A to B A Continuously increases
2 Potential energy from B to C B Continuously decreases
3 Speed of particle from B to C C First increases then remains constant
4 Acceleration of particle from A to C D None of these

 

Options:

1:B; 2:D; 3:A; 4:C

1:C; 2:D; 3:A; 4:B

1:B; 2:D; 3:C; 4:A

1:D; 2:B; 3:A; 4:C

Correct Answer:

1:B; 2:D; 3:A; 4:C

Explanation:

\(U(r) = -\frac{GMm}{R}\) for r \(\geq\) r 

thus, decreases continuously from A to B. 

 

Speed from B to C remains constant. c → s As between B to C there is no field, So acceleration becomes zero and it increases from A to B. d → r

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