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Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to the initial horizontal velocity component, highest first.
20
Oct
Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to the initial horizontal velocity component, highest first. Figure shows four paths for a kicked football. Ignoring the effects of air on the flight highest first. rank the paths according to the initial horizontal velocity [...]
Four particles A, B, C and D are situated at the vertices of a rectangle of sides d at t = 0. Each of the particle moves with constant speed v. A always has its velocity along AB, B along BC, C along CD and D along DA. At which time will the particles meet each other ?
20
Oct
Four particles A, B, C and D are situated at the vertices of a rectangle of sides d at t = 0. Each of the particle moves with constant speed v. A always has its velocity along AB, B along BC, C along CD and D along DA. At which time will the particles meet [...]
Two particles are projected simultaneously in the same vertical plane from the same point, with different speeds u1 and u2, making angles θ1 and θ2 respectively with the horizontal. The path followed by one, as seen by the other (as long as both are in flight), is
20
Oct
Two particles are projected simultaneously in the same vertical plane from the same point, with different speeds u1 and u2, making angles θ1 and θ2 respectively with the horizontal. The path followed by one, as seen by the other (as long as both are in flight), is as seen by the other (as long as [...]
A body thrown horizontally from the top of a building with a speed 20m/s, strikes the ground 40m away from the foot of tower. The height of the tower is
20
Oct
A body thrown horizontally from the top of a building with a speed 20m/s, strikes the ground 40m away from the foot of tower. The height of the tower is A body thrown horizontally from the top of a building with a speed 20m/s strikes the ground 40m away from the foot of tower. The [...]
A particle is thrown with speed u at an angle of projection θ with horizontal as shown. (i) The average velocity of particle from O to A is ucosθ (ii) The average velocity of particle from O to H (highest point) is u/21+3cos2θ−−−−−−−−−√ (iii) The average velocity of particle from J to K is u cos θ (iv) The angle between the velocity and the acceleration between O and H is greater than 90^∘, between H to A is less than 90^∘ and at highest point is 90^∘
20
Oct
A particle is thrown with speed u at an angle of projection θ with horizontal as shown. (i) The average velocity of particle from O to A is ucosθ (ii) The average velocity of particle from O to H (highest point) is u/21+3cos2θ−−−−−−−−−√ (iii) The average velocity of particle from J to K is u [...]
A point moves linearly with deceleration which is given by dv/dt = −αv√, where alpha is a positive constant. At the start v=v0. The distance traveled by particle before it stops will be
20
Oct
A point moves linearly with deceleration which is given by dv/dt = −αv√, where alpha is a positive constant. At the start v=v0. The distance traveled by particle before it stops will be A point moves linearly with deceleration which is given by dv/dt = −αv√ where alpha is a positive constant. At the start [...]
A body is projected vertically upwards. If t1 and t2 be the times at which it is at a height h above the point of projection while ascending and descending respectively, then h is
20
Oct
A body is projected vertically upwards. If t1 and t2 be the times at which it is at a height h above the point of projection while ascending and descending respectively, then h is A body is projected vertically upwards. If t1 and t2 be the times at which it is at a height h [...]
In a magnetic field as shown, in Fig. two horizontal wires of same mass and length l1 and l2 are free to slide on different vertical rails with velocities v1 and v2 respectively. If the resistance of two circuits are same and a1anda2 are acceleration of two horizontal wires respectively, the condition for a1>a2 is
20
Oct
In a magnetic field as shown, in Fig. two horizontal wires of same mass and length l1 and l2 are free to slide on different vertical rails with velocities v1 and v2 respectively. If the resistance of two circuits are same and a1anda2 are acceleration of two horizontal wires respectively, the condition for a1>a2 is [...]
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0). If the rod moves with a velocity v = v0 ,
find the emf induced between the ends of the rod. ,
In a magnetic field as shown ,
L ,
The magnetic field inn a region is given by B = k B0/L y where L is a fixed length. A conducting rod of length L lies along the Y - axis between the origin and the point (0 ,
A stone dropped from a building of height h and it reaches after t second on the earth. From the same building if two stones are thrown (one upwards and other downwards) with the same speed and they reach the earth surface after t1 and t2 seconds, respectively, then
20
Oct
A stone dropped from a building of height h and it reaches after t second on the earth. From the same building if two stones are thrown (one upwards and other downwards) with the same speed and they reach the earth surface after t1 and t2 seconds, respectively, then Two particles are shown in figure. [...]
In the previous problem, if two falling conductors attain velocities v1andv2 respectively after falling through same height h, ratio of energy dissipated as heat to the energy dissipated in resistor per unit time for two conductors is same. Find which of the following condition will be satisfied
20
Oct
In the previous problem, if two falling conductors attain velocities v1andv2 respectively after falling through same height h, ratio of energy dissipated as heat to the energy dissipated in resistor per unit time for two conductors is same. Find which of the following condition will be satisfied if two falling conductors attain velocities v1andv2 respectively [...]
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if two falling conductors attain velocities v1andv2 respectively after falling through same height h ,
In the previous problem ,
ratio of energy dissipated as heat to the energy dissipated in resistor per unit time for two conductors is same. Find which of the following condition will be satisfied ,