Question:

In two different experiments, an object of mass $5\, kg$ moving with a speed of $25 \,ms ^{-1}$ hits two different walls and comes to rest within
(i) 3 second, 
(ii) 5 seconds, respectively.
Choose the correct option out of the following :

Updated On: Dec 18, 2023
  • Impulse and average force acting on the object will be same for both the cases.
  • Impulse and average force acting on the object will be same for both the cases.
  • Average force will be same for both the cases but the impulse will be different.
  • Average force and impulse will be different for both the cases.
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The Correct Option is B

Solution and Explanation

From the given options the correct answer is option (B): Impulse and average force acting on the object will be same for both the cases.

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Magnets are used in many devices like electric bells, telephones, radio, loudspeakers, motors, fans, screwdrivers, lifting heavy iron loads, super-fast trains, especially in foreign countries, refrigerators, etc.

Magnetite is the world’s first magnet. This is also called a natural magnet.  Though magnets occur naturally, we can also impart magnetic properties to a substance. It would be an artificial magnet in that case.

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Some of the properties of the magnetic field lines are:

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  • But here the lines seem to originate from the South pole and terminate at the North pole to form closed loops.
  • More number of close lines indicate a stronger magnetic field
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  • The tangent drawn at the field line gives the direction of the field at that point.