Below are the Physics MCQs online test 2024:
Physics Dynamics MCQs Online Test:
1➤ Newton's first law of motion is valid only in the absence of:
ⓑ Net force
ⓒ Friction
ⓓ Momentum
2➤ Inertia depends upon
ⓑ Net force
ⓒ Mass
ⓓ Velocity
3➤ A boy jumps out of a moving bus. There is a danger for him to fall:
ⓑ Away from the bus
ⓒ In the direction of motion
ⓓ Opposite to the direction of motion
4➤ A string is stretched by two equal and opposite forces 10 N each. The tension in the string is
ⓑ 5N
ⓒ 10 N
ⓓ 20 N
5➤ The mass of a body:
ⓑ Increases when accelerated
ⓒ Decreases when moving with high velocity
ⓓ None of the above
6➤ Two bodies of masses m1 and m2 attached to the ends of a n inextensible string passing over a frictionless pulling such that both move vertically. The acceleration of the bodies is:
ⓑ m, m₂ 2g* m₁ + m2
ⓒ m, + m2 m₁ m₂ g
ⓓ 2m, m₂ m₁ + m₂ g
7➤ Which of the following is the unit of momentum?
ⓑ Kgms2
ⓒ Ns
ⓓ Ns¹
8➤ When horse pulls a cart, the action is on the:
ⓑ Horse
ⓒ Earth
ⓓ Earth and cart
9➤ Which of the following material lowers friction when pushed between metal plates?
ⓑ Fine marble powder
ⓒ Air
ⓓ Oil
10➤ The branch of physics which deals with the motion of an object as well as its cause:
ⓑ Kinematics
ⓒ Dynamics
ⓓ All of these
11➤ Newton's first law of motion is also known as:
ⓑ Law of momentum
ⓒ Law of gravitation
ⓓ Law of energy
12➤ The unit of force:
ⓑ N
ⓒ Kgms¹
ⓓ Kg
13➤ Equation of momentum is:
ⓑ P=mv²
ⓒ P = (mv)²
ⓓ P = mv
14➤ Which of the following is the unit of momentum
ⓑ Kgms¹
ⓒ Ns¹
ⓓ Both a & b
15➤ The value of acceleration produced by a 20 N force in a mass of 8 kg is:
ⓑ 3.5 ms²
ⓒ 5.5 ms²
ⓓ 7.5 ms²
16➤ The unit of weight in system international is
ⓑ Newton
ⓒ Pound
ⓓ Dyne
17➤ The weight of a body is 147 N. Its mass will be:
ⓑ 0.147 kg
ⓒ 14.7 kg
ⓓ 147 kg
18➤ Which of the following relation is corrects?
ⓑ F = m/a
ⓒ F= ma
ⓓ F = a/m
19➤ Rate of change of momentum is equal to:
ⓑ Mass
ⓒ Force
ⓓ Distance
20➤ 1 N =
ⓑ Kgms
ⓒ Kgms¹
ⓓ Kgms²
21➤ The unit of coefficient of friction is:
ⓑ Ns
ⓒ NM
ⓓ No unit
22➤ The force oppose the motion of a moving object is called:
ⓑ Friction
ⓒ Power
ⓓ Work
23➤ Coefficient of friction between tyre and wet road
ⓑ 0.6
ⓒ 1
ⓓ 0.2
24➤ The maximum value of friction is called:
ⓑ Normal reaction
ⓒ Limiting friction
ⓓ None of these
25➤ If the velocity of the body becomes double then, centripetal force will be:
ⓑ Double
ⓒ Four times greater
ⓓ Remain same
26➤ In isolated system the momentum after collision of two bodies:
ⓑ Decrease
ⓒ Constant
ⓓ Zero
27➤ Centripetal force always acts to the motion of the body.
ⓑ Perpendicular
ⓒ Tangent
ⓓ Anti-parallel
28➤ Rolling friction is friction------------ sliding friction
ⓑ More than
ⓒ Equal to
ⓓ None of these
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