In a uniform circular motion, which of the following quantity is not constant
1. Angular momentum
2. Speed
3. Kinetic energy
4. Momentum
A particle is moving with veocity ; where k is constant. The general equation for the path is:
1.
2.
3.
4. xy=constant
A particle is projected with a velocity u making an angle with the horizontal. At any instant, its velocity v is at right angles to its initial velocity u; then v is:
1. ucos
2. utan
3. ucot
4. usec
A projectile is given an initial velocity of . The cartesian equation of its path is (g = 10 )
1.
2.
3.
4.
A ship A is moving westwards with a speed of 10 km and a ship B, 100 km south of A is moving northwards with a speed of 10 km . The time after which the distance between them becomes the shortest, is:
1. 5 hr
2. hr
3. hr
4. 0 hr
Time taken by the projectile to reach from A to B is t. Then the distance AB is equal to :
1.
2.
3.
4. 2ut
A particle projected with kinetic energy with an angle of projection . Then the variation of kinetic K with vertical displacement y is
1. linear
2. parabolic
3. hyperbolic
4. periodic
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. The time taken by the man is 12 min
2. The time taken by the man is 8 min
3. The value of is 45
4. The value of is 53
A body is thrown horizontally with a velocity \(\sqrt{2 g h}\) 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. | \(\frac{h}{2} \) |
3. | \(2 h \) | 4. | \( \frac{2 h}{3}\) |
Two 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