Q: Which type of inertia is the resistance of a body to change its state of rest?
A.Inertia of direction
B.Inertia of motion
C.Inertia of rest
D.None of the above
Correct Option: CExplanation:
The resistance of a body to change its state of rest is called inertia of rest.
Q: Which of the following is NOT true about force?
A.Force can cause a stationary object to move.
B.Force can cause a moving object to change direction.
C.Force always requires contact between two objects.
D.Force is a vector quantity.
Correct Option: CExplanation:
Force can be transmitted through contact, such as a push or pull, but it can also act at a distance, such as the gravitational force between two objects. Therefore, C is not true, and the correct answer is C)
Q: What is the value of the universal gravitational constant (G)?
A.9.8 Nm
B.6.674 x 10^-11 Nm^2/kg^2
C.3 x 10^8 m/s
D.1.6 x 10^-19 C
Correct Option: BExplanation: The universal gravitational constant (G) is a physical constant that appears in the equation for Newton's law of gravitation. Its value in SI units is 6.674 x 10^-11 Nm^2/kg^2.
Q: Which of the following statements is true about Newton's second law of motion?
A.The force acting on a body is directly proportional to the mass of the body.
B.The force acting on a body is inversely proportional to the rate of change of momentum of the body.
C.The force acting on a body is directly proportional to the acceleration of the body.
D.The force acting on a body is inversely proportional to the velocity of the body.
Correct Option: CExplanation:
Newton's second law of motion states that the force acting on a body is directly proportional to the rate of change of its momentum, which is also equal to the product of its mass and acceleration. Thus, the correct statement is that the force acting on a body is directly proportional to the acceleration of the body.
Q: What is the formula for change in momentum?
A.Δp = Pf – Pi
B.Δp = Pi – Pf
C.Δp = Pi + Pf
D.Δp = Pf + Pi
Correct Option: AExplanation:
The formula for change in momentum is Δp = Pf – Pi, where Pf is the final momentum of the body and Pi is the initial momentum of the body.
Q: What is the definition of inertia?
A.A body's tendency to resist changes in its state of motion
B.A body's tendency to change its state of motion
C.A body's tendency to move in a straight line
D.A body's tendency to move with uniform velocity
Correct Option: AExplanation:
Inertia is the property of a body that tends to resist any change in its state of motion. This means that a body at rest tends to remain at rest, and a body in motion tends to continue moving with a constant velocity in a straight line unless acted upon by an external force.
Q: When does the principle of conservation of linear momentum hold true?
A.When there is a net external force acting on a system of bodies
B.When there is no net external force acting on a system of bodies
C.When the velocity of the first body is higher than that of the second body
D.When two bodies collide in a straight line
Correct Option: BExplanation: The principle of conservation of linear momentum holds true when there is no net external force acting on a system of bodies. This means that the total momentum of the system before an event (like a collision) is equal to the total momentum of the system after the event.
Q: What is the formula for linear momentum?
A. p = mv
B.F = ma
C.W = Fd
D.P = F/A
Correct Option: AExplanation:
The formula for linear momentum is p = mv, where p is the momentum, m is the mass, and v is the velocity of the body..
Q: Change in momentum can be achieved in two ways. They are:
A. a large force acting for a short period of time
B.a smaller force acting for a longer period of time
C.both A and B
D.none of the above
Correct Option: CExplanation: Change in momentum can be achieved in two ways: a large force acting for a short period of time and a smaller force acting for a longer period of time.
Q: What is the SI unit of torque?
A.Joule
B.Newton
C.Watt
D.Newton-meter
Correct Option: DExplanation:
Torque is a vector quantity that is measured by the product of the force and the perpendicular distance between the fixed point or fixed axis and the line of action of the force. Its SI unit is Newton-meter.
Laws of motion - Quiz .jpeg)
Optics - Quiz 53 
Acoustics - Quiz 50