motion, forces, and energy

According to Newton's first law of motion every body continues to be in its state of rest or uniform motion along a straight line unless an external force acts on it. This means that a ball moving on a horizontal surface should continue to move indefinitely as no ..

Force and Inertia - An interaction which causes an acceleration is called a force. Only when we push a ball does it begin to move. A ball lying on a horizontal floor doesn't start to move all by itself. For that matter, take a parked a car on a horizontal road. Only when we acti..

An interaction which causes an acceleration is called a force. Only when we push a ball does it begin to move. A ball lying on a horizontal floor doesn't start to move all by itself. For that matter, take a parked a car on a horizontal road. Only when we activate the engine and enga..

Drop a stone from a height. What do you observe? The stone which was initially at rest starts moving towards the ground and attains a maximum speed just before it touches the ground. The stone is not moving with uniform speed. Its speed keeps changing at every instant, which means that the stone is..

What do you observe when you drop a stone from a height? The stone which was initially at rest starts moving towards the ground and attains a maximum speed just before it touches the ground. Is the stone moving with a constant speed? No, it is not moving with uniform speed. Its speed keeps changing..

Summary - The essential conditions to be satisfied for work to be done are: Some force must act on the object The point of application of force must move in the direction of force W = F x S SI unit of work is joule Energy is the capacity to do work The two ty..

Heat and Motion (Kinetic Theory of Heat) - Under normal conditions matter exists in three forms: solid liquid gas Matter is made up of atoms and molecules. These atoms in molecules are in a state of continuous motion. For example, molecules and atoms of a solid can have only vib..

Introduction - Newton's Law of Motion - Whenever we push or pull an object, we do so by means of a force. Force is an interaction between two bodies which causes acceleration, or simply, motion..

The first law of motion and inertia also applies to objects in motion. For example, When you pedal a bicycle, you accelerate to make the bicycle move forward. Because the forces acting on the bicycle are balanced, the bicycle and the rider keep moving at the same ..