The given pair is

If the mass of earth is 80 times of that of a planet and diameter is double that of planet and  'g' on the earth is 9.8 ms², then the value of ' g ' on that planet is ….

If the relation between subnormal 'SN' and subtangent 'ST' at any point on the curve by  is  then 

For such questions, we should know the formulas of subnormal and subtangent.

If the radius of earth is R then height 'h ' at which value of ' g' becomes one - fourth is

An object weights 72 N on the earth. Its weight at a height R/2 from earth is ……N

If mass of a body is M on the earth surface, than the mass of the same body on the moont surfae is

If the density of small planet is that of the same as that of the earth while the radius of the planet is 0.2 times that of lhe earth, the gravitational acceleration on the surface of the planet is……

The depth of at which the value of acceleration due to gravity becomes 1/n the time the value of at the surface is (R= radius of earth)

The moon's radius is 1/4 that of earth and its mass is 1/80 times that of the earth. If g  represents the acceleration due to gravity on the surface of earth, that on the surface of the moon is

The length of the tangent of the curves  is

For such questions, we should know the properties of trignometric functions and their different formulas.

If earth rotates faster than its present speed the weight of an object will.

The value of g on be earth surface is 980 cm/. Its value at a height of 64 km from the earth surface is....cm5^-2

A body weights 700 g wt on the surface of earth How much it weight on the surface of planet whose mass is 1/7 and radius is half that of the earth

in a sine wave, position of different particles at time t =0 is sbown in figure: The equation for this wave travelling along the positive x - direction can be

Aspherical planet far out in space has mas Mo and diameter Do. A particle of  falling near the surface of this planet will experience an acceleration due to gravity which is equal to

If then

We have used rules of indices and different formulae of differentiation to solve the question. When we find the derivative w.r.t to some variable we take another variable as consta.