Arihant Physics by D.C Pandey
Figure shows the velocity time graph for a particle travelling along a straight line. The magnitude of average velocity (in m/s) of particle during the time interval from t = 0 to t = 6s is 10α. Find the value of α.
18
Oct
Figure shows the velocity time graph for a particle travelling along a straight line. The magnitude of average velocity (in m/s) of particle during the time interval from t = 0 to t = 6s is 10α. Find the value of α. A car starts moving along a line A sphere of mass 10 kg [...]
A ball is thrown upwards with a speed of 40m/s. When the speed becomes half of the initial speed, gravity is switched off for next 2 second. After that gravity is again switched on but magnitude gravity is doubled. The total distance travelled by the ball from t=0 to the time when the ball reaches the maximum height is 55β. Find the value of β.
18
Oct
A ball is thrown upwards with a speed of 40m/s. When the speed becomes half of the initial speed, gravity is switched off for next 2 second. After that gravity is again switched on but magnitude gravity is doubled. The total distance travelled by the ball from t=0 to the time when the ball reaches [...]
A particle is moving with velocity (2i+3j) m/s from a point (4,5) m. At time same instant a particle B, moving in the same plane with velocity (4i + j) m/s passes through a point C(0, -3)m. Find the x – coordinate (in m) of the point where the particles collide.
18
Oct
A particle is moving with velocity (2i+3j) m/s from a point (4,5) m. At time same instant a particle B, moving in the same plane with velocity (4i + j) m/s passes through a point C(0, -3)m. Find the x – coordinate (in m) of the point where the particles collide. -3)m. Find the x [...]
Two particles are moving with velocities v1 = i – tj + k and v2 = ti + tj + 2k m/s respectively. Time at which they are moving perpendicular to each other is ……..(second)
18
Oct
Two particles are moving with velocities v1 = i – tj + k and v2 = ti + tj + 2k m/s respectively. Time at which they are moving perpendicular to each other is ……..(second) Two particles are moving with velocities v1 = i - tj + k and v2 = ti + tj + [...]
The diagram shows the variation of 1/v (where v is velocity of the particle) with respect to time. At time t = 3 s using the details given in the graph, find the instantaneous acceleration (in m/s^2)
18
Oct
The diagram shows the variation of 1/v (where v is velocity of the particle) with respect to time. At time t = 3 s using the details given in the graph, find the instantaneous acceleration (in m/s^2) find the instantaneous acceleration (in m/s^2) The diagram shows the variation of 1/v (where v is velocity of [...]
A lift performs the first part of its ascent with uniform acceleration, a, and the remaining with uniform retardation, 2a. If, t, is the time of ascent, the depth of the shaft is at^2/n. Find value of n.
18
Oct
A lift performs the first part of its ascent with uniform acceleration, a, and the remaining with uniform retardation, 2a. If, t, is the time of ascent, the depth of the shaft is at^2/n. Find value of n. 2a. If A lift performs the first part of its ascent with uniform acceleration A) and the [...]
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 [...]