A body is projected with velocity 203 m/s with an angle of projection 60° with horizontal. Calculate velocity on that point where body makes an angle 30° with the horizontal.

1. 20 m/s

2. 203 m/s

3. 103 m/s

4. 10 m/s

Subtopic:  Projectile Motion |
 64%
From NCERT
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In a uniform circular motion, which of the following quantity is not constant

1. Angular momentum

2. Speed

3. Kinetic energy

4. Momentum

Subtopic:  Circular Motion |
 52%
From NCERT
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A particle projected with kinetic energy k0 with an angle of projection θ. Then the variation of kinetic K with vertical displacement y is

1.  linear

2.  parabolic

3.  hyperbolic

4.  periodic

Subtopic:  Projectile Motion |
From NCERT
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A body is projected with a velocity \(u\) with an angle of projection \(\theta.\) The change in velocity after the time \((t)\) from the time of projection will be:

1. \(gt\) 2. \(\frac{1}{2}gt^2\)
3. \(u\sin\theta\) 4. \(u\cos\theta\)
Subtopic:  Projectile Motion |
 53%
From NCERT
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A particle has initial velocity 3i^+4j^ and has acceleration 0.4i^+0.3j^. Its speed after 10 s:

1. 7 units

2. 72 units

3. 8.5 units

4. 10 units

Subtopic:  Uniformly Accelerated Motion |
 79%
From NCERT
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The gravity in space is given by g=-10 j^ ms-2. Two particles are simultaneously projected with velocity u1=10 ms-1i^+10 ms-1j^ and u2=20 ms-1i^+10 ms-1j^. Then, the ratio of their times of flight

1. 1:1

2. 1:2

3. 2:1

4. none

Subtopic:  Projectile Motion |
 66%
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What determines the nature of the path followed by the particle?

1. Speed only

2. Velocity only

3. Acceleration only

4. None of these

Subtopic:  Projectile Motion |
From NCERT
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A boat is sent across a river in perpendicular direction with a velocity of 8 km/hr. If the resultant velocity of boat is 10 km/hr, then velocity of the river is : 

1. 10 km/hr

2. 8 km/hr

3. 6 km/hr

4. 4 km/hr

Subtopic:  Relative Motion |
 85%
From NCERT
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A river is flowing from W to E with a speed of 5 m/min. A man can swim in still water with a velocity 10 m/min. In which direction should the man swim so as to take the shortest possible path to go to the south. 

1. 30° with downstream

2. 60° with downstream

3. 120° with downstream

4. South

Subtopic:  Relative Motion |
 54%
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A train is moving towards east and a car is along north, both with same speed. The observed direction of car to the passenger in the train is 

1. East-north direction

2. West-north direction

3. South-east direction

4. None of these

Subtopic:  Relative Motion |
 60%
From NCERT
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