Practical Activities

Question 1

Laboratory measurements of speed (4)

Answer 1

2 light gates
1 light gate
Ticker timer
Motion sensor

Question 2

Measurements of speed using light gates

Answer 2

MUST BE CONNECTED TO A TIMER
Timer starts when beam of light is broken

Question 3

Measuring speed using a ticket timer

Answer 3

Marks dots at regular intervals because it works with and alternating current (usually 50Hz) so the pattern of dots act as a record of the objects movement. If there is even spacing on the tape it is moving at a constant speed, increasing spacing is increasing speed. Measuring every fifth dot from the start of the tape gives you the trolleys distance at intervals of 0.10s.

Question 4

Measuring speed using a motion sensor

Answer 4

Motion sensor transmits regular pulses of ultrasound at the object, detects the reflected waves and determines the time taken for the trip to the object and back.