A trolley with a 5.0 cm long card passed through a single light gate. The time recorded by a digital timer was 0.40 s.then the average speed of the trolley would be 0.125 ms⁻¹.
What is speed?
The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is meter/second. The generally considered unit for speed is a meter per second.
The mathematical expression for average speed is given by
average speed = distance /total time
As given in the problem a trolley with a 5.0 cm long card passed through a single light gate. The time recorded by a digital timer was 0.40 s
100 cm = 1 m
1 cm = 1/100 m
5 cm = 5×1/100 m
=0.05 m
By substituting the values in the formula of the average speed
average speed = distance /total time
=0.05/0.4 m/s
=0.125 m/s
Thus, the average speed of the trolley would be 0.125 ms⁻¹.
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