A body of mass m is thrown upwards at an angle θ with the horizontal with velocity v. While rising up the velocity of the mass after t seconds will be 

(1) (vcosθ)2+(vsinθ)2

(2) (vcosθvsinθ)2gt

(3) v2+g2t2(2vsinθ)gt

(4) v2+g2t2(2vcosθ)gt 

Subtopic:  Projectile Motion |
 63%
From NCERT
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A cricketer can throw a ball to a maximum horizontal distance of 100 m. With the same effort, he throws the ball vertically upwards. The maximum height attained by the ball is 

1. 100 m

2. 80 m

3. 60 m

4. 50 m

Subtopic:  Projectile Motion |
 75%
From NCERT
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A ball is projected with velocity v0 at an angle of elevation 30°. Mark the correct statement.

(1) Kinetic energy will be zero at the highest point of the trajectory.

(2) Vertical component of momentum will be conserved.

(3) Horizontal component of momentum will be conserved.

(4) Gravitational potential energy will be minimum at the highest point of the trajectory.

Subtopic:  Projectile Motion |
 78%
From NCERT
PMT - 2004
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Neglecting the air resistance, the time of flight of a projectile is determined by:

(1) Uvertical

(2) Uhorizontal

(3) U = U2vertical + U2horizontal

(4) U = U(U2vertical + U2horizontal )1/2

Subtopic:  Projectile Motion |
 74%
From NCERT
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A stone is thrown at an angle θ with the horizontal reaches a maximum height of H. Then the time of flight of stone will be:

(1) 2Hg

(2) 22Hg

(3) 22Hsinθg

(4) 2Hsinθg

Subtopic:  Projectile Motion |
 54%
From NCERT
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The horizontal range of a projectile is 43 times its maximum height. Its angle of projection will be:

1. 45°

2. 60°

3. 90°

4. 30°

Subtopic:  Projectile Motion |
 74%
From NCERT
PMT - 2003
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The maximum horizontal range of a projectile is 400 m. The maximum value of height(ever possible) attained by it will be 

(1) 100 m

(2) 200 m

(3) 400 m

(4) 800 m

Subtopic:  Projectile Motion |
 60%
From NCERT
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Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first

(1) 1, 2, 3, 4

(2) 2, 3, 4, 1

(3) 3, 4, 1, 2

(4) 4, 3, 2, 1

Subtopic:  Projectile Motion |
 78%
From NCERT
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A man standing on a road holds his umbrella at 30° with the vertical to keep the rain away. He throws the umbrella and starts running at 10 km/hr. He finds that raindrops are hitting his head vertically, the speed of raindrops with respect to the road will be:

(1) 10 km/hr

(2) 20 km/hr

(3) 30 km/hr

(4) 40 km/hr

Subtopic:  Relative Motion |
 77%
From NCERT
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A river is flowing from east to west at a speed of 5 m/min. A man on south bank of river, capable of swimming 10m/min in still water, wants to swim across the river in shortest time. He should swim:

1. Due north

2. Due north-east

3. Due north-east with double the speed of the river

4. None of the above

Subtopic:  Relative Motion |
 58%
From NCERT
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