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Center of Mass and Collision question

2023 · Q171
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Center of Mass and Collision question

2023 · Q171

NEETPhysicsCenter of Mass and CollisionMCQ+4 / −1

A 1 kg1 \mathrm{~kg}1 kg object strikes a wall with velocity 1 m s−11 \mathrm{~m} \mathrm{~s}^{-1}1 m s−1 at an angle of 60∘60^{\circ}60∘ with the wall and reflects at the same angle. If it remains in contact with wall for 0.1 s0.1 \mathrm{~s}0.1 s, then the force exerted on the wall is :

  1. A
    303 N30 \sqrt{3} \mathrm{~N}303​ N
  2. B
    Zero
  3. C
    103 N10 \sqrt{3} \mathrm{~N}103​ N
  4. D
    203 N20 \sqrt{3} \mathrm{~N}203​ N
View written solutionFree

Correct answer: C

NEET 2023 Manipur Physics - Center of Mass and Collision Question 5 English Explanation

$$F=\left|\frac{\Delta \vec{p}}{\Delta t}\right|=\frac{2 m v \sin \theta}{\mathrm{t}}=\frac{2(1)(1) \sin 60^{\circ}}{0.1}=10 \sqrt{3} \mathrm{~N}$$

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