A river is flowing with a speed of 1 km/hr. A swimmer wants to go to point 'C' starting from 'A'. He swims with a speed of 5 km/hr, at an angle with respect to the river. If AB=BC=400m. Then-
(1) time taken by the man is 12 min
(2) time taken by the man is 8 min
(3) the value of is 45
(4) the value of is 53
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA body is thrown horizontally with a velocity from the top of a tower of height h. It strikes the level ground through the foot of the tower at a distance x from the tower. The value of x is:
1. h
2.
3. 2h
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo men P & Q are standing at corners A & B of square ABCD of side 8 m. They start moving along the track with constant speed 2 m/s and 10 m/s respectively. The time when they will meet for the first time, is equal to:
1. 2 sec
2. 3 sec
3. 1 sec
4. 6 sec
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA particle starts from the origin at t=0 and moves in the x-y plane with constant acceleration 'a' in the y direction. Its equation of motion is . The x component of its velocity (at t=0) is:
(1) variable
(2)
(3)
(4)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA body is projected with a velocity u with an angle of projection . Change in velocity after the time (t) from the time of projection will be
1. gt
2.
3. u sin
4. u cos
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat determines the nature of the path followed by the particle?
(1) Speed only
(2) Velocity only
(3) Acceleration only
(4) None of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA boat is moving with velocity of in river and water is moving with a velocity of with respect to ground. Relative velocity of boat with respect to water is:
(1)
(2)
(3)
(4)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA boat moves with a speed of 5 km/h relative to water in a river flowing with a speed of 3 km/h and having a width of 1 km. The minimum time taken around a round trip(returning to the initial point) is:
(1) 5 min
(2) 60 min
(3) 20 min
(4) 30 min
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology