Arihant Physics by D.C Pandey
Two identical trains take 3 sec to pass one another when going in the opposite direction but only 2.5 sec if the speed of one is increased by 50%. The time one would take to pass the other when going in the same direction at their original speed is
18
Oct
Two identical trains take 3 sec to pass one another when going in the opposite direction but only 2.5 sec if the speed of one is increased by 50%. The time one would take to pass the other when going in the same direction at their original speed is A particle starts from rest with [...]
To cross the river in shortest distance, a swimmer should swimming an angle `theta with the upsteram. What is the ratio of the time taken to swim across in the shortest time to that in swimming across over shortest distance. [Assume that the speed of swimmer in still water is greater than the speed of river flow]
18
Oct
To cross the river in shortest distance, a swimmer should swimming an angle `theta with the upsteram. What is the ratio of the time taken to swim across in the shortest time to that in swimming across over shortest distance. [Assume that the speed of swimmer in still water is greater than the speed of [...]
Two trains A and B ,100km apart are travelling towards each other on different tracks with same starting speed of 50km/h. The train A accelerates at 20 km/h^2 and the train B retards at the rate 20 km/h^2. The distance covered by the train A when they cross each other is
18
Oct
Two trains A and B ,100km apart are travelling towards each other on different tracks with same starting speed of 50km/h. The train A accelerates at 20 km/h^2 and the train B retards at the rate 20 km/h^2. The distance covered by the train A when they cross each other is A particle has a [...]
Shown in the figure are the velocity time graphs of the two particle P1 and P2 moving in same straight line in same direction. Which of the following statements about their relative motion is true?
18
Oct
Shown in the figure are the velocity time graphs of the two particle P1 and P2 moving in same straight line in same direction. Which of the following statements about their relative motion is true? Shown in the figure are the velocity time graphs of the two particle P1 and P2 moving in same straight [...]
A particle is thrown upwards from ground. It experiences a constant air resistance which can produce a retardation of 2 ms^−2 opposite to the direction of velocity of particle. The ratio of time of ascent to time of descent is (g= 10 m/s^2 )
18
Oct
A particle is thrown upwards from ground. It experiences a constant air resistance which can produce a retardation of 2 ms^−2 opposite to the direction of velocity of particle. The ratio of time of ascent to time of descent is (g= 10 m/s^2 ) A particle has a velocity u towards east at t=0. Its [...]
A balloon is moving upwards with velocity 10m/s. It releases a stone which comes down to the ground in 11s. The height of the balloon from the ground at the moment when the stone was dropped is (g=10m/s^2)
18
Oct
A balloon is moving upwards with velocity 10m/s. It releases a stone which comes down to the ground in 11s. The height of the balloon from the ground at the moment when the stone was dropped is (g=10m/s^2) A particle has a velocity u towards east at t=0. Its acceleration is towards west and is [...]
A particle starts from rest with uniform acceleration a. Its velocity after n second is v. The displacement of the body in the last two second is
18
Oct
A particle starts from rest with uniform acceleration a. Its velocity after n second is v. The displacement of the body in the last two second is A particle starts from rest with uniform acceleration a. Its velocity after n second is v. The displacement of the body in the last two second is October [...]
A stone is thrown vertically upwards with an initial speed u from the top of a tower, reaches the ground with a speed 3u. The height of the tower is :
18
Oct
A stone is thrown vertically upwards with an initial speed u from the top of a tower, reaches the ground with a speed 3u. The height of the tower is : A stone is thrown vertically upwards with an initial speed u from the top of a tower reaches the ground with a speed 3u. [...]
Two balls of equal masses are thrown upwards, along the same vertical direction at an interval of 2 seconds, with the same initial velocity of 40m/s. Then these collide at a height of (Take g=10m/s^2).
18
Oct
Two balls of equal masses are thrown upwards, along the same vertical direction at an interval of 2 seconds, with the same initial velocity of 40m/s. Then these collide at a height of (Take g=10m/s^2). along the same vertical direction at an interval of 2 seconds Two balls of equal masses are thrown upwards with [...]
A stone is dropped into a well in which the level of water is h below the top of the well. If v is velocity of sound, the time T after which the splash is heard is given by
18
Oct
A stone is dropped into a well in which the level of water is h below the top of the well. If v is velocity of sound, the time T after which the splash is heard is given by A stone is dropped into a well in which the level of water is h below [...]