Laws of Motion & Friction · JEE Main previous year questions

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2022 32 questions

Q522022 · 26 Jun 2022 · Shift 2· Numerical answer
A batsman hits back a ball of mass 0.4 kg straight in the direction of the bowler without changing its initial speed of $15 ms^{- 1}$ . The impulse imparted to the ball is ________ Ns.
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Answer: 12
Q532022 · 26 Jun 2022 · Shift 2· Numerical answer
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Answer: 36
Q512022 · 25 Jun 2022 · Shift 1· Numerical answer
A uniform chain of 6 m length is placed on a table such that a part of its length is hanging over the edge of the table. The system is at rest. The co-efficient of static friction between the chain and the surface of the table is 0.5, the maximum length of the chain hanging from the table is ___________ m.
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Answer: 2
Q522022 · 25 Jun 2022 · Shift 2· Numerical answer
A curve in a level road has a radius 75 m. The maximum speed of a car turning this curved road can be 30 m/s without skidding. If radius of curved road is changed to 48 m and the coefficient of friction between the tyres and the road remains same, then maximum allowed speed would be ___________ m/s.
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Answer: 24
Q532022 · 25 Jun 2022 · Shift 2· Numerical answer
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Answer: 12
Q332022 · 24 Jun 2022 · Shift 2
A stone of mass m, tied to a string is being whirled in a vertical circle with a uniform speed. The tension in the string is
1. A.the same throughout the motion.
2. B.minimum at the highest position of the circular path.
3. C.minimum at the lowest position of the circular path.
4. D.minimum when the rope is in the horizontal position.
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Answer: B
Q522022 · 24 Jun 2022 · Shift 2· Numerical answer
Two travelling waves of equal amplitudes and equal frequencies move in opposite directions along a string. They interfere to produce a stationary wave whose equation is given by $y = (10 cos π x sin \frac{2 π t}{T}) cm$ The amplitude of the particle at $x = \frac{4}{3} cm$ will be ____ $cm$ .
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Answer: 5