Conceptual Question and Numerical Problem from Gravity and Gravition

Question 1: If earth suddenly stops rotating about its axis. What would be the effect of g? Would this effect be same at all places?

Some Numerical and Conceptual Question in Circular Motion

Question 1: An object of mass 8kg is whirled round in vertical circle of radius 2m with a constant speed of 6m/sec. Calculate the maximum and minimum tension in the string.

Numerical Problems in Work Energy and Power

Question 1: A 5kg monkey swings from a branch to another branch of 2m higher. What is the change in potential energy? What is the initial velocity of initial kinetic energy of the monkey?

Chapter 5: Work Energy and Power

Question 1: Define work, energy and power.

Chapter 4 : Friction

Question 1: Define Friction. Explain Laws of Solid Friction.

Chapter 3 : Projectiles

Question 1: Define Projectile. Derive an expression for the time of flight, maximum height and horizontal range when it is projected from ground.

Chapter 2 : Vectors and Scalars

Question 1 : Define Scalar and Vector Quantities. Also show the representation of vectors.

Answer : 

Scalar Quantities : Those physical quantities which have only magnitude is called scalar quantities. For example : Mass, Length, Time, Temperature, Speed, Volume, Distance, e.t.c.

Chapter 1 : Dimensions

Important Question and their Solutions :

Question 1 :

 

Define Dimension. Determine dimension of Force, Pressure and Power.

 

Solutions:

Dimensions is a simply a power to be raised in a physical quantities of length, mass and time. The dimension of physical quantities can be written as block letter including large bracket in both sides.