Physics GK 04 - Motion & Friction

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1).
What is the apparent weight of the person when the elevator is accelerating downwards?
2).
The forces acting at a point are called as:
3).
The force acting on a body for a short time are called as:
4).
Newton's third law of motion applies  to which of these forces?
5).
The inablity of a body to change its state of rest or motion is known as:
6).
Which of these is the cause of Friction?
7).
What is the relationship between Kinetic and limiting friction?
8).
When one body is actually moving over the surface of other body, the friction is known as:
9).
The value of coefficient of limiting friction does not depend on which of the following?
10).
Which of the following is NOT a method to reduce friction?
11).
Which of these is the force required to move a body uniformly in a circle?
12).
The centripetal force and centrifugal force are ______:
13).
What is the rate of acceleration produced by 1 dyne force acting on a body of mass 1 gram?
14).
The Newton's third law is applicable when:
15).
The apparent weight of the body becomes zero in which of the following cases in the elevator?
16).
Which of the following is NOT correct about the velocity of rocket at any time?
17).
The thrust on the rocket is:
18).
Which of the following is correct about the coefficient of limiting friction between any two surfaces in contact?
19).
Angle of friction is _______:
20).
Which of the following is an example of application of force?
21).
What is the product of the mass of the body and its velocity called as?
22).
As per the Newton's second law of motion, what is the relation between the rate of change of linear momentum and the external force applied?
23).
The second law of motion gives us a measure of which of the following physical quantities?
24).
1 kilogram force produces how much acceleration in a body of mass 1 kg?
25).
Which of these is/are examples of conservation of linear momentum?
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
2. The forces acting at a point are called as:
[A] Collinear forces
[B] Coplanar forces
[C] Concurrent forces
[D] Unit forces
3. The force acting on a body for a short time are called as:
[A] Average force
[B] Momentum
[C] Impulse
[D] Tension
4. Newton’s third law of motion applies  to which of these forces?
[A] Gravitational
[B] Electric
[C] Magnetic
[D] All of the Above
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
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
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
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
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
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
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