Related Questions

What cause a moving body to resist a change in its state of motion?
A Displacement
B Acceleration
C Inertia
D Velocity
An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's
A First law
B Second law
C Third law
D Fourth law
The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
To resist spalling tendency, a refractory should have
A Greater diffusivity
B Low specific heat
C Low thermal co-efficient of expansion
D All of the above
Which of the following physical quantities changes or tends to change the state of rest or of uniform motion of a body in a straight line?
A Force
B Mass
C Momentum
D Inertia
The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is
A Weight
B Mass
C Inertia
D Momentum
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called
A upthrust
B reaction
C buoyancy
D metacentre
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called
A Up-thrust
B Reaction
C Buoyancy
D Metacentre
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,
A P + ma = 0
B P - ma = 0
C P × ma = 0
D $$\frac{{\text{P}}}{{{\text{ma}}}} = 0$$
The fabric which is able to totally resist the penetration of water is known as-
A Water resistant
B Water nepellent
C Water proof
D Water inhabited

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