A particle starts its motion from rest under the action of a constant force. If the distance covered in first 10 seconds is S₁ and that covered in the first 20 seconds is S₂, then: […]
A man throws balls with the same speed vertically upwards one after the other at an interval of 2 s.What should be the speed of the throw,so that more than two balls are in the […]
A ballon rises from rest with a constant acceleration g/8. A stone is released from it when it has risen to height h.The time taken by the stone to reach the ground is
Options […]
An object moving with a speed of 6.25 m/s, is deaccelerated at a rate given by (dv/dt)= -2.5√v, where v is the instantaneous speed.The time taken by the object ,to come to rest would be […]
A particle moving along a straight line OX.At a time (in second ) the distance x (in metre) of the particle from O is given by x=40+12 t-t³.How long would the particle travel before coming […]
A ball is projected upwards from the foot of a tower. The ball crosses the top of the tower twice after an interval of 6 s and the ball reaches the ground after 12 s.The […]
The displacement ‘x’ (in meter) of a particle of mass ‘m’ (in kg) moving in one dimension under the action of a force, is related to time ‘t’ (in sec) by t = √x + […]
When a ball is thrown up vertically with velocity vₒ,it reaches a maximum height of h.If one wishes to triple the maximum height,then the ball should be thrown with velocity
Options
(a) √3vₒ […]
A particle moving along X-axis has acceleration f,at time t given by f=fₒ(1- t/T), where fₒ and T are constants. The particle’s velocity (vₓ) is
Options
(a) fₒT (b) (1/2)fₒT² (c) fₒT² (d) (1/2)fₒT
A body is thrown vertically up with a velocity u.It passes three points A,B and C in its upward journey with velocity u/2,u/3 and u/4,respectively.The ratio of separations between points AB and between BC,i.e, AB/BC […]
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