PG TRB Physics Study Material. We covered all the PG TRB Physics Study Material in this post for free so that you can practice well for the exam.
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PG TRB Physics Mock Test for Students
Two identical cylinders are released from the top of two identical inclined planes. If one rolls without sliding and the other slides without rolling then :
(A) the Sliding cylinder reaches the bottom first with a greater speed
(B) the Rolling cylinder reaches the bottom first with greater velocity
(C) Both reach the bottom simultaneously
(D) Nothing can be predicted.
Option a – the Sliding cylinder reaches the bottom first with a greater speed
Two spheres one hollow, and another solid of the same mass and radius are allowed to roll down an inclined plane from the same height which of them reaches the bottom first :
(A) Hollow sphere
(B) Solid sphere
(C) Both reach simultaneously
(D) Nothing can be predicted
Option b – Solid sphere
A and B are two solid spheres of equal masses. A roll down an inclined plane without slipping from a height of 3 m. B falls down vertically from the same height. Then on reaching the ground :
(A) A can do more work than B
(B) B can do more work than A
(C) A and B can do the same work
(D) A and B will not do any work
Option c – A and B can do the same work
A solid cylinder of radius 10 cm rolls down an inclined plane of height 25 cm without slipping. The linear velocity of the solid cylinder at the bottom is :
(A) 280 cm /s
(B) 180 cm /s
(C) 18 cm/s
(D) 28 cm /s
Option b – 180 cm /s
When a ring rolls down an inclined plane the percentage of energy which translational K.E. and rotational K.E.:
(A) 50% and 50%
(B) 25% and 75%
(C) 75% and 25%
(D) 30% and 70%
Option a – 50% and 50%
A hollow cylinder and a solid cylinder of the same mass and radius are made to roll down on an inclined plane. Which one reaches the bottom first?
(A) The solid cylinder
(B) The hollow cylinder
(C) Both together
(D) The one with a higher density of material
Option a – The solid cylinder
A rod of length 1.5 m hung at one end is kept in a horizontal position, then it is released, its angular velocity at the vertical position will be :
(A) 5.2 rad/s
(B) 4.43 rad/s.
(C) 3.13 rad/s
(D) 2.25 rad/s
Option b – 4.43 rad/s
A meter scale is standing vertically on a horizontal table on one of its ends. The velocity with which the free end of the meter scale will strike the table when it falls freely without slipping (g= 10 m/s) :
(A) 4.9 m/s
(B) 5.5 m/s
(C) 9.8 m/s
(D) 30 m/s
Option b – 5.5 m/s
A disc of mass 2 kg is rolling on a horizontal surface with a velocity of 2 m/s then its total kinetic energy is :
(A) 1 J
(B) 2 J
(C) 3.5 J
(D) 6 J
Option d – 6 J
A sphere of mass 1 kg and diameter 1 m rolls on a horizontal surface with a liner speed of 10 m/s without slipping, then work is done to stop the sphere :
(A) 50 J
(B) 70 J
(C) 100 J
(D) 25 J
Option b – 70 J
A ring, disc, or hollow sphere of the same mass and same radius are released simultaneously from the inclined plane. The bodies have different times of descent because.
(A) They have different frictional forces
(B) They have different materials
(C) They have different areas of contact
(D) They have a different radius of gyration
Option d – They have a different radius of gyration
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