Volume 1
Speed time graph of two cars A and B approaching towards each other is shown in figure. Initial distance between them is 60 m. The two cars will cross each other after t seconds. Find value of it t.
18
Oct
Speed time graph of two cars A and B approaching towards each other is shown in figure. Initial distance between them is 60 m. The two cars will cross each other after t seconds. Find value of it t. Speed time graph of two cars A and B approaching towards each other is shown in [...]
If a particle takes t second less and acquire a velocity of vms^−1 more in falling through the same distance on two planets where the accelerations due to gravity are 2g and 8g respectively, then v=x gt. Find value of x
18
Oct
If a particle takes t second less and acquire a velocity of vms^−1 more in falling through the same distance on two planets where the accelerations due to gravity are 2g and 8g respectively, then v=x gt. Find value of x If a particle takes t second less and acquire a velocity of vms^−1 more [...]
A car starts moving along a line, first with acceleration a = 5m/s^2 starting from rest then uniformly and finally decelerating at the same rate till it comes to rest. The total of motion is 25s. The average speed during the time is 20m/s. The particle moves uniformly for (2.5x) second. Find the value of x.
18
Oct
A car starts moving along a line, first with acceleration a = 5m/s^2 starting from rest then uniformly and finally decelerating at the same rate till it comes to rest. The total of motion is 25s. The average speed during the time is 20m/s. The particle moves uniformly for (2.5x) second. Find the value of [...]
A wave frequency 400 hz has a wave velocity of 300m/s. The phase difference between two displacement at certain point at time t=10^-3 s apart is
19
Sep
A wave frequency 400 hz has a wave velocity of 300m/s. The phase difference between two displacement at certain point at time t=10^-3 s apart is A wave frequency 400 hz has a wave velocity of 300m/s. The phase difference between two displacement at certain point at time t=10^-3 s apart is September 19, 2020 [...]
Two cars are moving on two perpendicular roads towards a crossing with uniform speeds of 72 km/h and 36 km/h. If first car blows horn. of frequency 280 Hz, then the frequency of horn. heard by the driver of second car when line joining the car makes angle of 45 with the roads, will be
19
Sep
Two cars are moving on two perpendicular roads towards a crossing with uniform speeds of 72 km/h and 36 km/h. If first car blows horn. of frequency 280 Hz, then the frequency of horn. heard by the driver of second car when line joining the car makes angle of 45 with the roads, will be [...]
Two tuning forks A and B having a frequency of 500 Hz each are placed with B to the right of A. An observer in between the forks in moving towards B with a speed of 25 m/s. The speed of sound is 345 m/s and the wind speed is 5 m/s from A to B. Calculate the difference in the two frequencies heard by observer.
19
Sep
Two tuning forks A and B having a frequency of 500 Hz each are placed with B to the right of A. An observer in between the forks in moving towards B with a speed of 25 m/s. The speed of sound is 345 m/s and the wind speed is 5 m/s from A to [...]
A source of sound is approaching an observer with speed of 30ms and the observer is approaching the source with a speed 60 ms”. Then the fractional change in the frequency of sound in air (330ms) is
19
Sep
A source of sound is approaching an observer with speed of 30ms and the observer is approaching the source with a speed 60 ms”. Then the fractional change in the frequency of sound in air (330ms) is A source of sound is approaching an observer with speed of 30ms and the observer is approaching the [...]
What impulse need to be given to a body of mass m, released from the surface of earth along a straight tunnel passing through centre of earth, at the centre of earth, to bring it to rest. (Mass of earth M, radius of earth R)
19
Sep
What impulse need to be given to a body of mass m, released from the surface of earth along a straight tunnel passing through centre of earth, at the centre of earth, to bring it to rest. (Mass of earth M, radius of earth R) at the centre of earth radius of earth R) released [...]
What additional velocity must be given to a satellite orbiting around the earth with radius R to become free from earths gravitational field ? Mass of the earth is M.
19
Sep
What additional velocity must be given to a satellite orbiting around the earth with radius R to become free from earths gravitational field ? Mass of the earth is M. What additional velocity must be given to a satellite orbiting around the earth with radius R to become free from earths gravitational field ? Mass [...]
A planet of mass m is in an elliptical orbit about the sun with an orbital period T. If A be the area of orbit, then its angular momentum would be
19
Sep
A planet of mass m is in an elliptical orbit about the sun with an orbital period T. If A be the area of orbit, then its angular momentum would be A planet of mass m is in an elliptical orbit about the sun with an orbital period T. If A be the area of [...]