A block of wood weighs 10 N and is resting on an inclined plane. The coefficient of friction is 0.7. The frictional force that acts on the block, when the plane is 30° inclined with […]
A pellet of mass 1 g is moving with an angular velocity of 1 rad/s along a circle of radius 1 m the centrifugal force is
Options
(a) 0.1 dyne (b) 1 dyne […]
A roller coaster is designed such that riders experience “weightlessness” as they go round the top of a hill whose radius of curvature is 20 m. The speed of the car at the top of […]
A 0.5 kg ball moving with a speed of 12 m/s strikes a hard wall at an angle of 30° with the wall. It is reflected with the same speed at the same angle. If […]
A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10 sec. Then the coefficient of friction is
Options
(a) 0.01 (b) […]
A plumb line is suspended form a ceiling of a car moving with horizontal acceleration of ɑ. What will be the angle of inclination with vertical?
Options
(a) tan¯¹ (ɑ/g) (b) tan¯¹(g/ɑ) (c) […]
A body of mass 1.0 kg is falling with an acceleration of 10 ms⁻². Its apparent weight will be (g=10 ms⁻²)
Options
(a) 1.0 kg wt (b) 2.0 kg wt (c) zero (d) […]
The vector sum of two forces is perpendicular to their vector difference. In that case, the forces
Options
(a) Are equal to each other in magnitude (b) Are not equal to each other […]
A force of 10 newton acts on a body of mass 20 kg for 10 seconds. Change in its momentum is
Options
(a) 5 kg. ms⁻¹ (b) 200 kg. ms⁻¹ (c) 100 kg. ms⁻¹ […]
A block of mass 5 kg is moving horizontally at a speed of 1.5 m/s. A perpendicular force of 5 N acts on it for 4 sec. What will be the distance of the block […]
2017 Copyright Doctor Dreams Training Academy