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A student unable to answer a question on Newton's laws of motion attempts to pull himself up by tugging on her hair. He will not succeed.

A

as the force excerted is small

B

the frictional force while gripping , is small

C

Newton's law of inertia is not applicable to live beings

D

as the force applied is internal to the system

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The correct Answer is:
D
`N//A`
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Shalini is a student of class X. Her mother was preparing tea in an old electric kettle having metal case. When she switched on the electric kettle. she got a severe electric shock. Shalini put off the main switch qUickly and found that the connecting cord was torn, where her mother touched the metal case of the kettle. She also found that the red and black wires of the connecting cord were firmly connected to the two lower terminals of the power plug but the green wire of the cord was not connected to the upper terminal of the plug. Shalini replaced the torn connecting cord and also connected the three wires of the cord firmly to the power plug terminals. On the basis of the above passage, answer the following questions: What values are displayed by Shalini in this incident?

Shalini is a student of class X. Her mother was preparing tea in an old electric kettle having metal case. When she switched on the electric kettle. she got a severe electric shock. Shalini put off the main switch qUickly and found that the connecting cord was torn, where her mother touched the metal case of the kettle. She also found that the red and black wires of the connecting cord were firmly connected to the two lower terminals of the power plug but the green wire of the cord was not connected to the upper terminal of the plug. Shalini replaced the torn connecting cord and also connected the three wires of the cord firmly to the power plug terminals. On the basis of the above passage, answer the following questions: Which wire red. black or green, touched the metal case of electric kettle when Shalini.s mother got electric shock?

Shalini is a student of class X. Her mother was preparing tea in an old electric kettle having metal case. When she switched on the electric kettle. she got a severe electric shock. Shalini put off the main switch qUickly and found that the connecting cord was torn, where her mother touched the metal case of the kettle. She also found that the red and black wires of the connecting cord were firmly connected to the two lower terminals of the power plug but the green wire of the cord was not connected to the upper terminal of the plug. Shalini replaced the torn connecting cord and also connected the three wires of the cord firmly to the power plug terminals. On the basis of the above passage, answer the following questions: Why did Shalini switch off the main switch qUickly?