30 Questions
What happens to the mass of a body when its velocity is comparable to the velocity of light?
It increases
What is the condition for a system or a body to be in equilibrium?
The net force acting on it is zero
What is the relationship between inertia and mass of a body?
Inertia is directly proportional to the mass of the body
What is the consequence of a force acting on a body?
The body undergoes acceleration
What is the result of placing a weight W in X Pan and a weight W1 in Y Pan in a physical balance?
The balance becomes balanced
What is the primary reason why a person does not experience any jerk when the bus is in motion?
The entire body of the person is in motion with the bus
What is the main reason why the rider tends to fall backward when a horse starts suddenly?
The inertia of rest of the upper part of the body
Why does a bullet fired on a window pane make a clean hole through it, while a ball breaks the whole window?
The bullet has a higher speed than the ball
What is the reason why a stone tied to a string flies off along the tangent to the circle when the string breaks?
The stone's inertia of motion
What is the inability of a body to change by itself its direction of motion?
Inertia of direction
What is the effect of velocity on the length of a rod according to the special theory of relativity?
The length of the rod decreases with an increase in velocity
According to the special theory of relativity, what happens to the mass of a body as its velocity increases?
The mass of the body increases with an increase in velocity
What is the effect of motion on the clock rate according to the special theory of relativity?
The clock rate decreases with motion
What is the condition for rotational equilibrium about a point 'O' in a physical balance?
Xa = Yb
What type of balance is it when the masses of the pans are not equal?
False balance
What is the force acting on a rope when a person climbs up or down with uniform speed?
mg
What is the acceleration of a body moving down a smooth inclined plane of length l, height h and having angle of inclination θ?
g sin θ
What is the velocity of a body at the bottom of an inclined plane?
√(2gl sinθ)
Where do action and reaction forces act?
Along the line joining the centres of two bodies
What is the result of a falling object not falling straight down?
The earth's rotation causes the object to deflect
A block of mass m is accelerating on a smooth inclined plane. If the force acting on the block is F, what is the acceleration of the block?
F / m
Two blocks, one of mass m1 and the other of mass m2, are connected by a massless string and are on a smooth horizontal surface. If the system is accelerating, what is the tension in the string between the blocks?
(m1 + m2) * a
A massive pulley of mass M and radius R is rotating about its axis with an angular acceleration α. What is the net torque acting on the pulley?
M * R * α
A string of mass M is stretched between two points. If the force applied to one end of the string is F, what is the acceleration of the block at the other end?
F / M
A block of mass m is attached to a horizontal, massless spring of spring constant k. If the block is displaced and then released, what is the acceleration of the block?
-k / m
What is the primary characteristic of a body in equilibrium?
The net force acting on it is zero.
What is the relationship between the force applied to a body and its resulting acceleration?
The acceleration is directly proportional to the force.
What is the unit of force in the CGS system?
Dyne
What is the consequence of a force acting on a body in terms of its momentum?
The momentum of the body changes.
What is the direction of the force exerted by a rocket on its exhaust gases?
Backward, opposite to the direction of motion.
This quiz covers various examples of inertia and motion, including a person on a bus, a horse and rider, and a bullet and ball interacting with a window pane. Understand how inertia affects the motion of objects in different scenarios. Test your knowledge of physics concepts!
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