Light gates

What is a light gate?

• Something to calculate the speed using a ticker tape

• An instrument to see if the forces are balanced or unbalanced

• An instrument with an infrared transmitter that can be used to calculate speed

• An instrument to calculate the resultant force

What does the data logger do?

• Tells us the length of the object

• Tells us how fast the light gate is moving

• Shows how much time the beam was blocked for

What do we need to find to length of the object?

• light gate

• measuring tape

• newton meter

• vernier caliper

What equation do we use to find speed?

• time/distance

• distance/time

• velocity/time

• distance x time

If the length of the object is 3cm long and if the beam was blocked for 6 seconds, what is the speed of the light gate?

• 1 m/s

• 0.5 m/s

• 0.5 cm/s

• 1 cm/s