Physics - Equilibrium - KBSE

Physics - Equilibrium - KBSE

1. If a body is moving with uniform velocity then it has zero linear acceleration, it is said to be in :

a) Static equilibrium
b) None of these
c) Translational equilibrium
d) Neutral equilibrium
2. 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) 40 N downward, 40 cm on left
b) 30 N upward, 40 cm from the center
c) 30 N downward, 40 cm from the center on the right
d) 70N downward, 20 cm on right
3. 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) 2 N
b) 1.5 N
c) 20 N
d) 1.0 N
4. 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) 10N, 3N
b) 2.5N, 10N
c) Tension in each wire is 5N
d) 5N, 10 N
5. The center of gravity of a circular plate is:

a) At its center
b) At its Circumference
c) At its upper side
d) None of these
6. A book lying on table, A block is hanging from a string are the examples of:

a) Rotational equilibrium
b) Static equilibrium
c) Translational equilibrium
d) Dynamic equilibrium
7. If a body rotates with constant angular velocity then its angular acceleration will be zeroand the body is said to be in:

a) None of these
b) Static equilibrium
c) Rotational equilibrium
d) Neutral equilibrium
8. 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) None of these
b) Acceleration
c) Rest
d) Equilibrium
9. 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) 90 N
b) 60 N
c) 48 N
d) 40 N
10. The equilibrium of bodies which are moving with uniform velocity is called:

a) None of these
b) Dynamic equilibrium
c) Static equilibrium
d) Neutral equilibrium
11. Moment of force about a point is called as Torque which is equal to:

a) Product of force and the distance moved by the body
b) Number of complete rotations
c) Product of force and moment arm
d) Line of action of force
12. How many types of moments are there:

a) Anti-clockwise
b) Clockwise
c) Three type
d) Anti-clockwise & clockwise Moments
13. The equilibrium of bodies which are at rest is called:

a) Dynamic equilibrium
b) Rotational equilibrium
c) Translational equilibrium
d) Static equilibrium
14. The point at which whole weight of a body lies is called as:

a) Moment Arm
b) Inertia
c) Center of gravity
d) Acceleration due to gravity
15. 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
16. The S.I units of Torque is:

a) m /sec
b) Km- N
c) N-m
d) Kg - m
17. 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) 1.75 K.N & 20 K.N
b) 4000N & 1000 N
c) 2000N & 5000N
d) 27.5 K.N & 22.5 K.N
18. 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) 30 cm
c) 50cm
d) 40 cm
19. The jumping of paratrooper by a parachute, the motion of a small steel ball in viscous liquid are the examples of:

a) Static equilibrium
b) Dynamic equilibrium
c) None of these
d) Rotational equilibrium
20. If the sum of all the torques acting on a body is equal to zero then the body is said to be in the state of:

a) Third Condition of Equilibrium
b) First Condition of Equilibrium
c) None of these
d) Second Condition of Equilibrium
21. If a body is disturbed 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) None of these
c) Unstable Equilibrium
d) Stable Equilibrium
22. A body is said to be in the state of neutral equilibrium if its center of gravity is:

a) Below the point of suspension
b) Above the point of suspension
c) At the point of suspension
d) None of these
23. A body is said to be in equilibrium if it is moving with:

a) Uniform velocity
b) Uniform acceleration
c) Variable velocity
d) None of these
24. The product of force and moment arm is called:

a) Weight
b) Equilibrium
c) Torque
d) Center of gravity
25. If the sum of all the forces are acting on a body is zero then the body is said to be in the state of:

a) Equilibrium
b) Non - equilibrium state
c) Accelerating
d) None of these
26. A force of 50 N acts on a body of moment arm is 0.5 m, the value of torque acting on it is:

a) 35 N-m
b) 65 N - m
c) 100 N - m
d) 25 N - m
27. If a body is pulled by a force of 10 N towards left side what force will be required to balce it:

a) 10 N towards right side
b) 10 N upward
c) 10 N downward
d) None of these
28. A torque of 10 N-m is acting on body of moment arm 2m calculate the force acting on it:

a) 0.5 N
b) 1.5 N
c) 5 N
d) 20 N
29. The conditions of equilibrium are:

a) Two
b) Three
c) Four
d) None of these
30. The center of gravity of a triangular plate is located at:

a) Center of the plate
b) Intersection of altitudes
c) Intersection of medians
d) None of these
 
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