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General
Easy
Question
In a conical pendulum, the bob is rotated with different angular velocities and tension in the string is calculated for different values of 
. Which of them is correct graph between T & .
The correct answer is:
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If a particle takes t second less and acquires a velocity of v ms–1 more in falling through the same distance (starting from rest) on two planets where the accelerations due to gravity are 2 g and 8 g respectively then:
If a particle takes t second less and acquires a velocity of v ms–1 more in falling through the same distance (starting from rest) on two planets where the accelerations due to gravity are 2 g and 8 g respectively then:
physics-General
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Two particles start simultaneously from the same point and move along two straight lines, one with uniform velocity v and other with a uniform acceleration a. If 
is the angle between the lines of motion of two particles then the least value of relative velocity will be at time given by
Two particles start simultaneously from the same point and move along two straight lines, one with uniform velocity v and other with a uniform acceleration a. If is the angle between the lines of motion of two particles then the least value of relative velocity will be at time given by
physics-General
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A force 
acts on block shown. The force of friction acting on the block is :
A force acts on block shown. The force of friction acting on the block is :
physics-General
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A student calculates the acceleration of m1 in figure shown as 
Which assumption is not required to do this calculation.
A student calculates the acceleration of m1 in figure shown as Which assumption is not required to do this calculation.
physics-General
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Both the blocks shown here are of mass m and are moving with constant velocity in direction shown in a resistive medium which exerts equal constant force on both blocks in direction opposite to the velocity. The tension in the string connecting both of them will be : (Neglect friction)
Both the blocks shown here are of mass m and are moving with constant velocity in direction shown in a resistive medium which exerts equal constant force on both blocks in direction opposite to the velocity. The tension in the string connecting both of them will be : (Neglect friction)
physics-General
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Equal force F (> mg) is applied to string in all the 3 cases. Starting from rest, the point of application of force moves a distance of 2 m down in all cases. In which case the block has maximum kinetic energy?
Equal force F (> mg) is applied to string in all the 3 cases. Starting from rest, the point of application of force moves a distance of 2 m down in all cases. In which case the block has maximum kinetic energy?
physics-General
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What should be the minimum force P to be applied to the string so that block of mass m just begins to move up the frictionless plane.
What should be the minimum force P to be applied to the string so that block of mass m just begins to move up the frictionless plane.
physics-General
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A boat having a speed of 5 km/hr. in still water, crosses a river of width 1 km along the shortest possible path in 15 minutes. The speed of the river in Km/hr.
A boat having a speed of 5 km/hr. in still water, crosses a river of width 1 km along the shortest possible path in 15 minutes. The speed of the river in Km/hr.
physics-General
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A particle moves with constant speed v along a regular hexagon ABCDEF in the same order. Then the magnitude of the average velocity for its motion from A to
A particle moves with constant speed v along a regular hexagon ABCDEF in the same order. Then the magnitude of the average velocity for its motion from A to
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The figure shows the velocity (v) of a particle plotted against time (t)
The figure shows the velocity (v) of a particle plotted against time (t)
physics-General
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The velocities of A and B are marked in the figure. The velocity of block C is (assume that the pulleys are ideal and string inextensible)
The velocities of A and B are marked in the figure. The velocity of block C is (assume that the pulleys are ideal and string inextensible)
physics-General
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If acceleration of A is 2 m/s2 to left and acceleration of B is 1m/s2 to left, then acceleration of C is
If acceleration of A is 2 m/s2 to left and acceleration of B is 1m/s2 to left, then acceleration of C is
physics-General
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The pulleys in the diagram are all smooth and light. The acceleration of A is a upwards and the acceleration of C is f downwards. The acceleration of B is
The pulleys in the diagram are all smooth and light. The acceleration of A is a upwards and the acceleration of C is f downwards. The acceleration of B is
physics-General
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Find the velocity of the hanging block if the velocities of the free ends of the rope are as indicated in the figure.
Find the velocity of the hanging block if the velocities of the free ends of the rope are as indicated in the figure.
physics-General
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At a given instant, A is moving with velocity of 5m/s upwards What is velocity of B at that time
At a given instant, A is moving with velocity of 5m/s upwards What is velocity of B at that time
physics-General
