A lighter body and heavier body both are moving with same momentum and applying same retarding force. Their stoping distances are respectively. Then the correct relation between .
(1)
(2)
(3)
(4) None of these
A body is projected with velocity m/s with an angle of projection with horizontal. Calculate velocity on that point where body makes an angle with the horizontal.
(1) 20 m/s
(2)
(3)
(4) 10 m/s
Relation between velocity (v) and time (t) is , then which one of the following quantity is constant:
(1) Force
(2) Power
(3) Momentum
(4) Kinetic Energy
A particle is moving with velocity where k is constant. The general equation for path is
1.
2.
3.
4. xy=constant
A block is kept on a rough inclined plane with angle of inclination . The graph of net reaction (R) versus is.
1.
2.
3.
4. None of these
A block is placed on a rough horizontal plane. A time dependent horizontal force acts on the block. The acceleration time graph on the block is
1.
2.
3.
4.
A ball is thrown downwards with velocity v from the top of a tower and it reaches the ground with speed 3V What is the height of the tower?
(1)
(2)
(3)
(4)
The acceleration a (in ) of a body, starting from rest varies with time t (in s) following the equation a=3 t+4. The velocity of the body at time t=2s will be:
(1) 10
(2)
(3)
(4)
A stone falls freely from rest from a height h and it travels a distance in the last seconds. The value of h is:
(1) 145 m
(2) 100 m
(3) 122.5 m
(4) 200 m
Given that and makes an angle with and with . Which of the following options is correct ?
1. cannot be less than
2. < , if A<B
3. < , if A>B
4. < , if A=B
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. u cos
2. u tan
3. u cot
4. u sec
A projectile is given an initial velocity of . The cartesian equation of its path is (g = 10 ms-2)
1.
2.
3.
4.
A ship A is moving westwards with a speed of 10 km h-1 and a ship B, 100 km south of A is moving northwards with a speed of 10 km h-1. The time after which the distance between them becomes shortest, is:
1. 5 hr
2. 5 hr
3. 10 hr
4. 0 hr
A sphere of mass m moving with constant velocity hits another sphere of same mass at rest. If e is the coefficient of restitution. The ratio of their velocities after collision is
1. 1 + e
2.
3.
4.
A rod of length L and mass M is acted on by two unequal forces F1 and F2(<F1) as shown in the following figure.
The tension in the rod at a distance y from the end A is given by:
1.
2.
3.
4. None of the above
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 = 400 m. Then -
1. time taken by the man is 12 min
2. time taken by the man is 8 min
3. the value of is 45o
4. the value of is 53o
Two blocks A and B of masses m & 2 m respectively are held at rest such that the spring is in natural length. Find the accelerations of both the blocks just after release.
1.
2.
3. 0,0
4.
In the figure shown the potential energy U of a particle is plotted against its position 'x' from origin. Then which of the following statement is correct.
1. x1 is in stable equilibrium
2. x2 is in stable equilibrium
3. x3 is in stable equilibrium
4 none of these