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Physics Class 12th Laws of Motion Physics NCERT Exemplar Solutions Class 12th Chapter Five

A ball of mass 0.15 kg hits the wall with its initial speed of 12 ms^-1and bounces back without changing its initial speed. If the force applied by the wall on the ball during the contact is 100 N, calculate the time during of the contact of ball with the wall.

Option 1 -

0.018s

Option 2 -

0.036s

Option 3 -

0.009s

Option 4 -

0.072s

7 Views | Posted 2 months ago

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1 Answer

Answered by

alok kumar singh | Contributor-Level 10

2 months ago

Correct Option - 2

Detailed Solution:

$F = \frac{Δ ρ}{Δ t} = \frac{1.8 - (- 1.8)}{Δ t} = 100$

$\Rightarrow Δ t = \frac{3.6}{100} = 0.036 s e c$

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A ball of mass 0.15 kg hits the wall with its initial speed of 12 ms^-1and bounces back without changing its initial speed. If the force applied by the wall on the ball during the contact is 100 N, calculate the time during of the contact of ball with the wall.

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A ball of mass 0.15 kg hits the wall with its initial speed of 12 ms-1and bounces back without changing its initial speed. If the force applied by the wall on the ball during the contact is 100 N, calculate the time during of the contact of ball with the wall.

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A ball of mass 0.15 kg hits the wall with its initial speed of 12 ms^-1and bounces back without changing its initial speed. If the force applied by the wall on the ball during the contact is 100 N, calculate the time during of the contact of ball with the wall.