Question

Calculate the average time it took the car to travel 0. 25 and 0. 50 meters with four washers attached to the pulley. Record the averages, rounded to two decimal places, in Table C of your Student Guide. What is the average time it took the car to travel 0. 25 meters? seconds What is the average time it took the car to travel 0. 50 meters? seconds.

Answer 1

The average time it took the car to travel 0. 25 and 0. 50 meters with four washers attached to the pulley,

• For the average time it took the car to travel 0. 25 meters will be  2.23 seconds

• For the average time it took the car to travel 0. 50 meters will be 3.13 seconds.

Given:  Average time it took the car to travel is  0. 25m & 0. 50m

The average time it took the car to travel 0. 25 meters

Here we will solve by formula of Average i.e.

   $=\rm \dfrac{Trial \;1 \;time + Trial\; 2\; time + Trial \;3\;time}{3}\\\\= \dfrac{(2.24 + 2.21 + 2.23)}{3}$

On solving further we get,

  $\dfrac{6.68}{3}= 2.226667 \\\\= \rm 2.23\; seconds$ ( round off to  2 decimal places).

Similarly, The average time it took the car to travel 0. 50 meters

  $=\rm \dfrac{Trial \;1 \;time + Trial\; 2\; time + Trial \;3\;time}{3}\\= \dfrac{(3.16 + 3.08 + 3.15)}{3}$

On solving further we get,

     $\rm \dfrac{9.39} 3 = 3.13 seconds\\\\= 3.13\; seconds$

Therefore, The average time it took the car to travel 0. 25 and 0. 50 meters with four washers attached to the pulley,

• For the average time it took the car to travel 0. 25 meters will be  2.23 seconds

• For the average time it took the car to travel 0. 50 meters will be 3.13 seconds.

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