Physics-Objective Related Question Answers
876. The gravitational force on a body placed at the centre of the earth will be?
Zero
877. The freely falling body appears to be weightless. Why?
The force exerted by the earth is being used to accelerate the body.
878. What is the force that opposes the relative motion of two bodies that are in contact?
Friction
879. The phenomenon of photoelectric effect was first explained by?
Albert Einstein
880. What is the ability of fluids to offer resistance to flow?
Viscosity
881. The frictional force offered by a liquid is called?
Viscous force
882. Examples of viscous liquids?
Glycerine; Castor oil; Coal tar and honey
883. Force of attraction between molecules of the same kind is called?
Force of cohesion
884. Force of attraction between molecules of different kinds is called?
Force of adhesion
885. The internal force developed within a body when forces are applied on it is called?
Elastic force
886. Is steel or rubber more elastic?
Steel is much more elastic than rubber
887. The force between a magnet and a magnetic material or between two magnets is called?
Magnetic force
888. The path of the projectile is called?
trajectory
889. The trajectory of a projectile moving under the influence of a constant acceleration is a?
Parabola
890. The projectile has maximum range when the angle of projection is?
450
891. Why does an athlete run some distance before taking a long jump?
By running the athelets gives himself larger inertia of motion
892. What is Newton’s third law of motion?
To every action there is an equal and opposite reaction
893. The “theory of relativity” was explained by?
Albert Einstein
894. Albert Einstein got the Nobel Prize for Physics in 1921 for explaining?
Photo Electric Effect
895. The incapability of a body to change by itself its state of rest or its state of uniform motion along a straight line?
Inertia
896. According to Newton’s third law every force is accompanied by an equal and opposite force. Then how can a movement take place?
Action and reaction act on different bodies
897. Swimming is possible on account of?
Third law of motion
898. When we jump out of a boat standing in water it moves?
Backward
899. A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton’s?
Third law
900. A cannon after firing recoils due to?
Newton’s third law of motion
© 2002-2017 Omega Education PVT LTD...Privacy | Terms And Conditions
Question ANSWER With Solution