NCERT solutions for class 11 physics chapter 5 laws of motion – This chapter covers selected problems from the chapter laws of motion. Here we are solving selected problems both from the Exemplar and NCERT Physics textbook. If any problem needs some coverage of fundamentals we are catering that also. We are giving the reference […]

# Newton’s Law of Motion

## Solution of Physics Numericals for class 9 (set 1 Q16)

Problem Statement A bullet of mass 50 g moving with an initial velocity of 100 m/s, strikes a wooden block and comes to rest after penetrating a distance 2 cm in it. Calculate: (i) Initial momentum of the bullet (ii)final momentum of the bullet (iii) retardation caused by the wooden block, and (iv) resistive force […]

## Solution of Physics Numericals for class 9 (set 1 Q15)

Problem statement A force causes an acceleration of 10 m/s^2 in a body of mass 500 g. What acceleration would be caused by the same force in a body of mass 5 kg. Solution Case 1 mass = m=500 g = 0.5 kg Acceleration = a =10 m/s^2 Force = ma = 0.5 . 10 […]

## Solution of Physics Numericals for class 9 (set 1 Q14)

Problem Statement A body of mass 500 g, initially at rest, is acted upon by a force which causes it to move a distance of 4 m in 2 sec. Calculate the force applied. Solution: mass=m = 500 g = 0.5 kg Initial velocity = u = 0 Distance travelled = s=4 m Time duration […]

## Solution of Physics Numericals for class 9 (set 1 Q13)

Problem Statement A cricket ball of mass 100 g moving at a speed of 30 m/s is brought to rest by a player in 0.03 s. find the average force applied by the player. Solution: mass =m= 100 g = 100/1000 kg = 0.1 kg initial velocity = u=30 m/s Final velocity = v=0 Time […]

## Solution of Physics Numericals for class 9 (set 1 Q12)

Problem Statement A force acts for 0.1 sec on a body of mass 2 kg initially at rest. The force is then withdrawn and the body moves with a velocity of 2 m/s. Find the magnitude of the force. Solution of class 9 Set1 Q12 Solution: A force acts on a body for 0.1 sec. […]

## Solution of Physics Numericals for class 9 (set 1 Q11)

Problem Statement A force acts for 10 s on a stationary body of mass 100 kg after which the force ceases to act. The body moves through a distance of 100 m in the next 5 s. Calculate (i) the velocity acquired by the body, (ii) the acceleration produced by the force, and (iii) the […]

## Physics Numericals class 9 (CBSE/ICSE)–problem set2

Here we present another set of physics numerical for class 9. You can also get the solutions for this set of physics numerical for class 9. The Links to the solution are given beside the problems. You can try first try and then check the solutions. Or you can also directly refer to the solutions […]

## Newton’s Second Law and equation of Force

Newton’s Second Law states that the rate of change of momentum of a body is directly proportional to the net force applied on it, and this change in momentum takes place in the direction of the applied force. Mathematically it can be stated this way: F∝ (mV-mU)/t. Here, F is the net force acting on the […]

## Contact Forces between blocks – Application of Newton’s laws

Application of newton’s laws: Newton’s laws of motion give us concepts of force (first law), measurement of force with its equation (second law), and the reaction of force (3rd law). Today we will discuss an interesting topic of mechanics – the application of Newton’s laws. It will cover a few interesting applications of Newton’s Laws […]

## Pseudo force in Physics-did you know this?

What is a pseudo force? – Some forces are real, whereas others are not. Real forces have some physical origin, such as a gravitational pull, frictional force, or tension of the string. In contrast, fictitious force or pseudo force arises simply because the observer is in an accelerating or non-inertial frame of reference, such as […]

## Newton’s Third Law of motion – concepts and examples

Newton’s third law of motion states that to every action there is an equal and opposite reaction. This means for every action or force exerted by the first object on the second object, there will be a reaction force that is equal in magnitude and opposite in direction to the action force. And this reaction force […]

## Newton’s First Law of Motion doesn’t hold good for every frame of reference

The frame of reference and Newton’s first law of motion – This law says that if the sum of all the forces acting on a particle is zero then a static particle continues to remain at rest and a moving one continues moving with a constant velocity along a straight line. That means if no […]