Physics GK 04 - Motion & Friction

1. What is the apparent weight of the person when the elevator is accelerating downwards?
[A] equal to the actual weight
[B] greater than the actual weight
[C] less than the actual weight
[D] 0

Show Answer

2. The forces acting at a point are called as:
[A] Collinear forces
[B] Coplanar forces
[C] Concurrent forces
[D] Unit forces

Show Answer

3. The force acting on a body for a short time are called as:
[A] Average force
[B] Momentum
[C] Impulse
[D] Tension

Show Answer

4. Newton’s third law of motion applies  to which of these forces?
[A] Gravitational
[B] Electric
[C] Magnetic
[D] All of the Above

Show Answer

5. The inablity of a body to change its state of rest or motion is known as:
[A] Force
[B] Momentum
[C] Displacement
[D] Inertia

Show Answer

6. Which of these is the cause of Friction?
[A] Roughness of surfaces in contact
[B] Force of adhesion between the molecules of the surfaces in contact
[C] Both a and b
[D] None of the above

Show Answer

7. What is the relationship between Kinetic and limiting friction?
[A] Kinetic friction is slightly greater than limiting friction
[B] Kinetic friction is slightly less than limiting friction
[C] Kinetic friction is equal to limiting friction
[D] No relationship

Show Answer

8. When one body is actually moving over the surface of other body, the friction is known as:
[A] Kinetic friction
[B] Limiting friction
[C] Static friction
[D] Negative friction

Show Answer

9. The value of coefficient of limiting friction does not depend on which of the following?
[A] nature of the surfaces in contact
[B] total area of the surfaces in contact
[C] material of the surfaces in contact
[D] All of the above

Show Answer

10. Which of the following is NOT a method to reduce friction?
[A] By lubrication
[B] By polishing
[C] throwing sand on the ground
[D] None of the above

Show Answer

Advertisement

Kindly help us to keep GKToday updated and error free. Use this form to report error or outdated information in questions. We shall rectify asap...