A police jeep is chasing a culprit going on a motorbike.The motorbike crosses a turning at a speed of 72 km/h.The jeep follows it at a speed of 90 km/h,crossing the turning 10 s later […]
A 120 m long train is moving in a direction with speed 20 m/s.A train B moving with 30 m/s in the opposite direction and 130m long crosses the first train in a time
A rocket is fired upward from the earth surface such that it creates an acceleration of 19.6 m/s².If after 5s, its engine is switched off, the maximum height of the rocket from earth ‘s surface […]
A boat taken 2h to travel 8km and back in still water. If the velocity of water 4 km/h,the time for going up stream 8 km and coming back is
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(a) 2 […]
A body starts from rest, what is the ratio of the distance travelled by the body during the 4th second and 3rd second?
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(a) 7 / 5 (b) 5 / 7 (c) […]
An elevator car whose floor to ceiling distance is equal to 2.7m starts ascending with constant acceleration of 1.2 ms⁻².After 2s of the start, a bolt begins falling from the ceiling of the car.The free […]
The velocity of a particle at an instant is 10 ms⁻¹ and after 5 s the velocity of the particle is 20 ms⁻¹.The velocity 3s before in ms⁻¹ was
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(a) 8 ms⁻¹ (b) 4 […]
Two bodies of masses m₁ and m₂ and having velocities v₁ and v₂ respectively , moving along a straight line are brought to rest by equal resistances forces.If one moves twice as that of the […]
A boat which has a speed of 5 kmh⁻¹ in still water crosses river of width 1 km along the shortest path in 15 min.The width of the river in kmh⁻¹ is
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A particle moves along the x-axis such that its co-ordinate (x) varies with time (t), according to the expression x = 2- 5t + 6t², where x is in metre and t is in second.The […]
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