A. Ruler B. Protractor C. Watch D. Scale 2. By using the instruments from the ta

Question

A. Ruler

B. Protractor

C. Watch

D. Scale

2. By using the instruments from the task 1, you have determined that it takes 3s for a toy car to travel through the distance of 162cm. What are the relative uncertainties of the distance and time measurements? Which measurements is the least uncertain?

3. Calculate the average speed of the toy car. Decide whether you can use the weakest link rule to determine the relative uncertainty in speed estimation. Determine the range of possible values for the actual speed of the car.

ALL I NEED IS QUESTION NUMBER 3. PLEASE HELP, WILL RATE!

THANKS!

Explanation / Answer

1)

a) Ruler : Half of the smallest increment is 0.5mm=0.05cm=0.0005m. The answer 1mm is also can be considered as correct

b) protractor : half of the smallest increment is 0.5deg

c) Watch :Half of the smallest increment is 0.5sec

d) Scale : Half of the smallest increment is half of the smallest weight. Assuming the weights are in grams it is 0.5g.

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2)

relative uncertainty of the distance measurement is

0.05cm/162cm = 0.03%.

The relative uncertainty of the time measurement is 0.5sec/3sec = 16.7%.

Distance measurement is much more accurate.

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