A particle is projected at an angle with horizontal with an initial speed u. When it makes an angle with horizontal, its speed is:
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2.
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4.
A particle is moving with velocity where k is a constant. The general equation for the path will be:
1. | y = x2 + constant | 2. | y2 = x2 + constant |
3. | y = x + constant | 4. | xy=constant |
A body is thrown vertically so as to reach its maximum height in t second. The total time from the time of projection to reach a point at half of its maximum height while returning (in second) is:
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4.
A projectile is given an initial velocity of . The cartesian equation of its path is (g = 10 )
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2.
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4.
Time taken by the projectile to reach from A to B is t. Then the distance AB is equal to :
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2.
3.
4. 2ut
Three particles are moving with constant velocities and v respectively as given in the figure. After some time, if all the three particles are in the same line, then the relation among and v is:
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4.
A 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)
A particle starts from the origin at t=0 and moves in the x-y plane with a constant acceleration 'a' in the y direction. Its equation of motion is . The x component of its velocity (at t=0) will be:
1. variable
2.
3.
4.
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
A boat moves with a speed of 5 km/h relative to water in a river flowing with a speed of 3 km/h. Width of the river is 1 km. The minimum time taken for a round trip will be
1. 5 min
2. 60 min
3. 20 min
4. 30 min