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## Physics / Motion and Energy

### Physics / Motion and Energy

Motion makes the world go 'round'. When we think of motion we often think of cars, bicycles, kids running, basketballs bouncing and airplanes flying. But motion is so much more. A body is said to be in motion if it changes its position with respect to fixed point or objects around it.

Calculate the speed, velocity and acceleration of an object. Also compare which object is moving faster.

The general study of the relationships between motion, forces, and energy is called mechanics. A force is anything that can change the state of motion of an object, like a push or a pull. You use force when you push a letter on the computer keyboard or when you kick a ball. Forces are everywhere. Forces are measured in Newtons (after Sir Isaac Newton)

Learn about Newtons three laws of motion which relate the forces acting on a body to its motion.
• The first is the law of inertia, it states that every object in motion will stay in motion until acted upon by an outside force.
• The second is commonly stated as force equals mass into acceleration, or F = ma.
• The third and final law is to every action there is an equal and opposite reaction.

Exercises
Topics
Exercises
Topics
• ### Speed and Velocity - SmartTest

SmartTest on Speed and Velocity

• Questions: 10

### Accleration and Retardation - SmartTest

SmartTest on Accleration and Retardation

• Questions: 10

### Graphs and Equations - SmartTest

SmartTest on Graphs and Equations

• Questions: 10

### Falling bodies - SmartTest

SmartTest on Falling bodies

• Questions: 10

### Laws of Motion - SmartTest

SmartTest on Laws of Motion

• Questions: 10

### Kinetic and Potential Energy - SmartTest

SmartTest on Kinetic and Potential Energy

• Questions: 10

### Circular motion - SmartTest

SmartTest on Circular motion

• Questions: 10
• Speed, Velocity and Acceleration
• Graphs and equations
• Falling bodies
• Force and acceleration
• Kinetic and potential energy
• Circular motion