newtons laws of motion p10

What is Newton’s first law?

His first law says that the velocity, speed and or direction of an object will only change if a resultant force is acting on it

What are examples of a change in velocity

• starts to move

• Stops moving

• Speeds up

• Slows down

• Changes direction

What is Newton’s third law

Newton’s third law says that when two objects interact they exert equal and opposite forces on each other

What is the resultant force of a stationary object

Zero

What is the resultant force on a object moving at a steady speed in a straight line

Zero

What will an object experience if the resultant force on it is not zero

• Acceleration

• Change in velocity

What is thinking distance

Distance a vehicle travels during a drivers reaction time

What is braking distance

Distance vehicle travels once breaks have been applied

Start is the relationship between stopping distance, thinking distance and breaking distance

Stopping distance = thinking distance + braking distance

What are three factors that can affect braking distance in a vehicle

• speed

• Road conditions

• Condition not tyres

• Breaks