An insect of mass m crawls along the hanging thread with an acceleration a - g -2- The normal reaction offered by ground on the block of mass 2 m kept stationary on ground isA- 1-2 mgC- mg D- 2 mg

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Standard XII

Physics

Gravtiational PE

An insect of ...

Question

An insect of mass m crawls along the hanging thread with an acceleration a = $\frac{g}{2}$ . The normal reaction offered by ground on the block of mass 2m kept stationary on ground is

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2 mg

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Solution

The correct option is D
mg

Let's assume that due to insects pull the string has a tension T

Tension is same in the entire string Free Body Diagram of insect

T - mg = $\frac{m}{2} g$ N + T = 2mg

T = $\frac{3 m g}{2}$ N = 2mg - T

N = $\frac{m g}{2}$

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An insect of mass m crawls along the hanging thread with an acceleration a =g2. The normal reaction offered by ground on the block of mass 2m kept stationary on ground is

The correct option is D mg Let's assume that due to insects pull the string has a tension T Tension is same in the entire string Free Body Diagram of insect T - mg = m2g N + T = 2mg T = 3mg2 N = 2mg - T N = mg2

An insect of mass m crawls along the hanging thread with an acceleration a = $\frac{g}{2}$ . The normal reaction offered by ground on the block of mass 2m kept stationary on ground is

The correct option is D
mg

Let's assume that due to insects pull the string has a tension T

Tension is same in the entire string Free Body Diagram of insect

T - mg = $\frac{m}{2} g$ N + T = 2mg

T = $\frac{3 m g}{2}$ N = 2mg - T

N = $\frac{m g}{2}$