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Physics
- Equilibrium
1.
If the sum of all the forces acting on a body is equal to zero then the body is said to be in the state of :
a) Equilibrium
b) Acceleration
c) Rest
d) None of these
2.
A uniform diving board 5m long fixed at one and supported by a vertical spring at 3m from fixed end, if the weight of the board is 48N calculate the tension in the spring:
a) 40 N
b) 60 N
c) 48 N
d) 90 N
3.
The point at which whole weight of a body lies is called as:
a) Center of gravity
b) Moment Arm
c) Acceleration due to gravity
d) Inertia
4.
If the sum of all the torques acting on a body is equal to zero, is:
a) Second Condition of Equilibrium
b) First Condition of Equilibrium
c) Third Condition of Equilibrium
d) None of these
5.
The center of gravity of a circular plate is:
a) At its center
b) At its upper side
c) At its Circumference
d) None of these
6.
If on disturbing a body slightly, there is no change in its center of gravity, then the body is said to be in the state of:
a) Neutral Equilibrium
b) Stable Equilibrium
c) Unstable Equilibrium
d) None of these
7.
A tube light 1.5m long is suspended by means of two perpendicular wires which hang from the ceiling. If the weight of the tube light is 10 N, then find the tension in the two wires:
a) Tension in each wire is 5N
b) 5N, 10 N
c) 10N, 3N
d) 2.5N, 10N
8.
A meter rod is supported on a pivot at its 30 cm mark. It is found that the meter rod is balances horizontally when a mass of 50gm is suspended at the 10 cm mark. If the mass of the rod is 40 gm the center of gravity of the rod is located at:
a) 55 cm mark
b) 50cm
c) 40 cm
d) 30 cm
9.
A uniform bridge of mass 4,000 kg and length is 40 m supported at both ends. A small truck of mass 1000kg is parked a quarter of the way across the bridge. The weight acting on each support is:
a) 27.5 K N & 22.5 K N
b) 1.75 K N & 20 K N
c) 2000n & 5000N
d) 4000N & 1000 N
10.
Moment of force about a point is called as Torque which is equal to:
a) Product of force and moment arm
b) Line of action of force
c) Product of force and the distance moved by the body
d) Number of complete rotations
11.
A uniform rod is balanced at its center. It has an object weighing 30 N placed 40 cm from its mid point on the left,
a) 30 N downward, 40 cm from the center on the right
b) 30 N upward, 40 cm from the center
c) 70N downward, 20 cm on right
d) 40 N downward, 40 cm on left
12.
A uniform meter rule is is supported at the 40 cm mark. A downward force of 0.5 N is applied at the 20cm mark to keep it balanced. The weight of the meter rule is:
a) 1.0 N
b) 20 N
c) 1.5 N
d) 2 N
13.
How many types of moments are there:
a) Anti-clockwise & clockwise Moments
b) Anti-clockwise
c) Clockwise
d) Zero type
14.
When an object is in equilibrium state then:
a) Its anti-clockwise moment will be equal to clockwise moment
b) Its anti-clockwise moment will be half of its clockwise moment
c) Its anti-clockwise moment will be greater than its clockwise moment
d) Its clockwise moment will be zero
15.
The S.I units of Torque is:
a) N-m
b) Km- N
c) Kg - m
d) m/sec
16.
The equilibrium of bodies which are at rest is called:
a) Static equilibrium
b) Dynamic equilibrium
c) Rotational equilibrium
d) Translational equilibrium
17.
The equilibrium of bodies which are moving with uniform velocity is called:
a) Dynamic equilibrium
b) Static equilibrium
c) Neutral equilibrium
d) None of these
18.
If a body is moving with uniform velocity then it has zero linear acceleration, it is said to be in :
a) Translational equilibrium
b) Static equilibrium
c) Neutral equilibrium
d) None of these
19.
If a body rotates with constant angular velocity then its angular acceleration will be zeroand the body is said to be in:
a) Rotational equilibrium
b) Static equilibrium
c) Neutral equilibrium
d) None of these
20.
A book lying on table, A block is hanging from a string are the examples of:
a) Static equilibrium
b) Dynamic equilibrium
c) Rotational equilibrium
d) Translational equilibrium
21.
The jumping of paratrooper by a parachute, the motion of a small steel ball in viscous liquid are the examples of:
a) Dynamic equilibrium
b) Static equilibrium
c) Rotational equilibrium
d) None of these
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