Forces

Forces are...

• Amounts of mass

• Energy

• Pushes and pulls

How do we measure forces?

• Metre Stick

• Newton Meter

• Stopwatch

• Measuring cylinder

Forces always come...

• singly

• in pairs

• in triplets

• in groups of four

The force shown by the arrow is...

• Engine force

• Air resistance

• Gravity

• Weight

• Mass

The force in the opposite direction (the blue arrow) is...

• Engine force

• Reaction from the ground

• Weight

• Drag

If the yellow arrow force is larger than the purple arrow force...

• The car will decelerate if it's moving forwards

• The car will keep going at the same speed

• The car will reverse if it's stopped to start with

• The car will accelerate forwards

If the car is moving forwards, then the yellow arrow force could be...

• Drag

• Engine force

• Weight

• Reaction from the ground

The Newton meter (force meter)reading is...

• 0N

• 0.1N

• 1N

• 10N

There is no force on the Newton meter. This means that...

• The Newton meter needs to be calibrated by turning the screw at the top

• The Newton meter is working perfectly

• The Newton meter is broken and needs to be thrown away

Which are the non-contact forces?

• Drag

• Magnetic attraction

• Gravity

• Pushing a block