The centre of gravity of a quadrant of a circle lies along its central radius (r) at a distance of
The angle which the normal reaction makes with the resultant reaction is called angle of friction.
The matter contained in a body, is called
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:
The impact between two lead spheres is approximately equal to an __________ impact.
The potential energy stored by a spring in compression, is called strain energy.
The kinetic energy of a body __________ upon its mass and velocity.
Which of the following statement is correct?
According to lami's theorem
The centre of percussion is below the centre of gravity of the body and is at a distance equal to
If P is the force acting on the body, m is the mass of the body and a is the acceleration of the body, then according to Newton's second law of motion,
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.
The moment of a force
According to Newton's first law of motion,
The velocity ratio for the second system of pulleys is n.
When two elastic bodies collide with each other,
The time taken by a particle for one complete oscillation is known as periodic time.
Which of the following are vector quantities?
The law of the machine is(where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)
If a number of coplaner forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.
If the resultant of a number of forces acting on a body is zero, then the body will not be in equilibrium.
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