A stone falls freely under gravity. It covers distances h1, h2 and h3 in the first 5 seconds,the next 5 seconds and the next 5 seconds respectively. The relation between h1, h2 and h3 is […]
A particle covers half of its total distance with speed v1 and the rest half distance with speed v2. Its average speed during the complete journey is
Options
(a) (v1v2)/(v1+v2) (b) (2v1v2)/(v1+v2) (c) […]
A car wheel is rotated to uniform angular acceleration about its axis .Initially its angular velocity is zero. It rotates through an angle θ₁ in the first 2s, in the next 2s,it rotates through an […]
Two wheels having radii in the ratio 1:3 are connected by a common belt. If the smaller wheel is accelerated from rest at a rate 1.5 rad s⁻² for 10 s.the velocity of bigger wheel […]
A hemispherical bowl of radius R is rotating about its axis of symmetry which is kept vertical.A small ball kept in the bowl rotates with the bowl without sliiping on its surface.If the surface of […]
A heavy stone hanging from a massless string of length 15 m is projected horizontally with speed 147 ms⁻¹.The speed of the particle at the point where the tension in the string equals the weight […]
A motorcycle moving with a velocity 72 kmh⁻¹ on a flat road takes a turn on the road at a point where the radius of curvature of the road is 20 m,the acceleration due to […]
The string of a pendulum is horizontal.The mass of bob attached to it is m.Now, the string is released.The tension in the string in the lowest position is
Options
(a) mg (b) 2 […]
A solid body rotates about a stationary axis, so that its angular velocity depends on the rotation angle ? as ?= ?￢ﾂﾒ – k ?, where ?￢ﾂﾒ and k are positive constants.At the moment t=0, […]
A body is hanging from a rigid support by an inextensible string of length l.It is struck inelastically by an identical, body of mass m with horizontal velocity v=√2g l, the tensions in the string […]
2017-2025 Copyright Doctor Dreams Training Academy - About Us - Privacy Policy - Terms & Conditions - Contact Us - Refund Policy