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The velocity of a particle at an instant is 10 ms⁻¹.After 3 s its velocity will become 16 ms⁻¹.The velocity at 2 s before the given instant, will be
Options
(a) 6 ms⁻¹
(b) 4 ms⁻¹
(c) 2 ms⁻¹
(d) 1 ms⁻¹
Correct Answer:
6 ms⁻¹
Explanation:
Given: v=16 ms⁻¹;u=10 ms⁻¹;t= 3s; a=?
v=u+at
16=10+a(3)
3a=16-10⇒3a=6⇒a=2 ms⁻²
before 2 s,⇒10=u+2×2⇒u=6 ms⁻¹.
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Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In a Rutherford scattering experiment when a projectile of charge Z₁ and mass M₁
- Two poles of same strength attract each other with a force of magnitude F
- A car of mass m is moving on a level circular track of radius R
- The resistances of the four arms P,Q,R and S in a Wheatstone’s bridge
- A particle with charge q is moving along a circle of radius R with unoform speed v.
Topics: Motion in Straight Line (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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