The kinetic energy of a body during impact remains constant.
The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact.
The kinetic energy of a body before impact is less than the kinetic energy of a body after impact.
The kinetic energy of a body before impact is more than the kinetic energy of a body after impact.
D. The kinetic energy of a body before impact is more than the kinetic energy of a body after impact.
20 N
40 N
120 N
None of these
Straight line
Parabola
Hyperbola
Elliptical
Zero
Minimum
Maximum
None of these
Equal to
Less than
Greater than
None of these
g. cos² β/2u². sin (α + β). cos α
2u². sin (α + β). cos α/g. cos² β
g. cos² β/2u². sin (α - β). cos α
2u². sin (α - β). cos α/g. cos² β
7.8 N
8.9 N
9.8 N
12 N
Equal to
Less than
Greater than
None of these
Angle between normal reaction and the resultant of normal reaction and the limiting friction
Ratio of limiting friction and normal reaction
The ratio of minimum friction force to the friction force acting when the body is just about to move
The ratio of minimum friction force to friction force acting when the body is in motion
Coplanar concurrent forces
Coplanar non-concurrent forces
Like parallel forces
Unlike parallel forces
Momentum and impulse
Torque and energy
Torque and work
Moment of a force and angular momentum.
1/2
2/3
3/2
2/4
u² sin²α/2g
u² cos²α/2g
u² sin²α/g
u² cos²α/g
The point of C.G.
The point of metacenter
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
Point of suspension
kilogram
Newton
Watt
Dyne
Impulsive force
Mass
Weight
Momentum
W/√3 (compression)
W/√3 (tension)
2W/√3 (compression)
2W/√3 (tension)
Equal to
Less than
Greater than
None of these
Non-equilibrium
Partial equilibrium
Full equilibrium
Unpredictable
P + m.a = 0
P - m.a = 0
P × m.a = 0
P/m.a = 0
If a system of coplanar forces is in equilibrium, then their algebraic sum is zero
If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero
The algebraic sum of the moments of any two forces about any point is equal to moment of the resultant about the same point
Positive and negative couples can be balanced
A path, traced by a projectile in the space, is known as trajectory.
The velocity, with which a projectile is projected, is known as the velocity of projection.
The angle, with the horizontal, at which a projectile is projected, is known as angle of projection.
All of the above
Increase
Decrease
Remain the same
None of these
P = Q
Q = R
Q = 2R
None of these
One-fourth of the total height above base
One-third of the total height above base
One-half of the total height above base
Three-eighth of the total height above the base
db³/12
bd³/12
db³/36
bd³/36
The same as centre of gravity
The point of suspension
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
None of the above
Translatory motion
Rotational motion
Combined translatory and rotational motion
None of the above
(1 - sinφ)/(1 + sinφ)
(1 + sinφ)/(1 - sinφ)
(1 - tanφ)/(1 + tanφ)
(1 + tanφ)/(1 - tanφ)
Everybody continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts
To every action, there is always an equal and opposite reaction
None of the above
Concurrence of the medians
Intersection of its altitudes
Intersection of bisector of angles
Intersection of diagonals