Forces and machines

What is the speed?

• 140 km/h

• 120 km/h

• 130 km/h

• 115 km/h

What is the speed?

• 240 km/h

• 220 km/h

• 250 km/h

• 215 km/h

What is speed?

• How slow an object moves

• How fast an object moves

• The movement of an object

How do we calculate speed?

• Time/distance

• Distance/time

• Time/distance x 2

• Time/distance ²

How can we know the speed in a particular moment?

• Using a speedometer

• Using a metre

• Using a clock

• We can't know it

Some objects change their shape .......... and do not return to their initial shape

• temporaly

• permanently

• and break

Some objects change their shape ................... and return to their initial shape.

• temporaly

• permanently

• and break

Rigid objects ...................... when sufficient force is applied.

• change temporaly

• change permanently

• break

These allow a machine to detect information.

• Structure

• Motor

• Engine

• Electrical circuit

• Sensors

This produces movement by transforming chemical energy into mechanical energy.

• Structure

• Engine

• Motor

• Electrical circuit

• Sensors