Explain fluid friction. When an object moves in a fluid, i.e. a liquid or gas, the friction acts is called fluid friction. We have to overcome a barrier in water while swimming in the pond. This barrier is the fluid friction. A parachute works by harnessing the air resistance. The air resistance is a type … Read more
What is unbalanced force? When two or more forces acting on an object produce resultant force, i.e. the object has acceleration; we say that the forces are unbalanced. The forces that produce this unbalanced condition are called unbalanced forces.
Explain the firing by a gun. When a person fires with a gun, he feels a backward push at that time. In this case, action and reaction force of bullet and gun exists for the same time. According to Newton’s second law of motion, the bullet and the gun acquire equal and opposite momentum. As … Read more
What are the fundamental quantities? The quantities that are independent and neutral, and do not depend on any other quantity rather other quantities depend on them, are called fundamental quantities.
What is force? The force is something that works on a stationary body to create or tends to create motion, or that which works on a motion body to change the motion of the body or tries to increase its velocity.
What do you mean by inertia of motion? Everybody has the tendency to remain in the same state as it is. If the body is in motion it continues to be in motion. The tendency of a body to maintain its own state is called inertia. And the tendency of a moving body to continues … Read more
What do you mean by uniform acceleration? If the rate of increase of velocity of a moving body in a particular direction is maintained constantly all the time, then the acceleration is said to be uniform. An example of uniform acceleration is the acceleration of a freely falling body due to gravity. The acceleration of … Read more
Why does a bob eventually come to rest? The body eventually come to rest cause of balanced force. It is seem in figure that an object is suspended with a thread. The force of attraction of earth on the object i.e. the weight of the object W is acting vertically downward. The tension of the … Read more