Towards the wall at its upper end
Away from the wall at its upper end
Downward at its upper end
Upward at its upper end
D. Upward at its upper end
Proportional to normal load between the surfaces
Dependent on the materials of contact surface
Proportional to velocity of sliding
Independent of the area of contact surfaces
The centre of heavy portion
The bottom surface
The midpoint of its axis
All of the above
Iω
Iω2
0.5 Iω
0.5 Iω2
T.ω (in watts)
T.ω/60 (in watts)
T.ω/75 (in kilowatts)
T.ω/4500 (in kilowatts)
2mr2/3
2mr2/5
mr2
mr2/2
Equal to
Less than
Greater than
None of these
Change its motion
Balance the other forces acting on it
Retard its motion
All of the above
(1/2π). √(l/g)
(1/2π). √(g/l)
2π. √(l/g)
None of these
h/kG
h2/kG
kG2/h
h × kG
tanθ = ΣH/ΣV
tanθ = ΣV/ΣH
tanθ = ΣV × ΣH
tanθ = √(ΣV + ΣH)
Same at every point on its line of action
Different at different points on its line of action
Minimum, if it acts at the centre of gravity of the body
Maximum, if it acts at the centre of gravity of the body
2n³
2n
n²
3n² Where n = number of joints in a frame
h/2
J/3
h/6
h/4
bh3/4
bh3/8
bh3/12
bh3/36
Velocity
Acceleration
Momentum
None of these
Coplanar
Meet at one point
Both (A) and (B) above
All be equal
The algebraic sum of the forces, constituting the couple is zero
The algebraic sum of the forces, constituting the couple, about any point is the same
A couple cannot be balanced by a single force but can be balanced only by a couple of opposite sense
All of the above
Static friction
Dynamic friction
Limiting friction
Coefficient of friction
A force acting in the opposite direction to the motion of the body is called force of friction
The ratio of the limiting friction to the normal reaction is called coefficient of friction
A machine whose efficiency is 100% is known as an ideal machine
The velocity ratio of a machine is the ratio of load lifted to the effort applied
a2/8
a3/12
a4/12
a4/16
Limiting friction
Sliding friction
Rolling friction
Kinematic friction
No
Minimum
Maximum
None of these
Friction
Limiting friction
Repose
Kinematic friction
The algebraic sum of the resolved parts of the forces in the given direction
The sum of the resolved parts of the forces in the given direction
The difference of the forces multiplied by the cosine of θ
The sum of the forces multiplied by the sine of θ
Same
Half
Double
None of these
P = W tan (α - φ)
P = W tan (α + φ)
P = W tan (φ - α)
P = W cos (α + φ)
P = Q
Q = R
Q = 2R
None of these
Potential energy
Kinetic energy
Electrical energy
Chemical energy
1 m
2 m
3 m
4 m
Both the balls undergo an equal change in momentum
The change in momentum suffered by rubber ball is more than the lead ball
The change in momentum suffered by rubber ball is less than the lead ball
None of the above