Question

By how much does the speed of a vehicle moving in a straight line change each second when it is accelerating at 2 km/h·s? At 4 km/h·s? At 10 km/h·s?

Please include ALL work, thanks! :)

Answer 1

The change in speed of a vehicle moving in a straight line each second can be calculated using the formula:

change in speed = acceleration × time

• acceleration is measured in km/h·s

• time is measured in seconds.

For an acceleration of 2 km/h·s:

change in speed = 2 km/h·s × 1 s = 2 km/h

For an acceleration of 4 km/h·s:

change in speed = 4 km/h·s × 1 s = 4 km/h

For an acceleration of 10 km/h·s:

change in speed = 10 km/h·s × 1 s = 10 km/h

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Answer 2

acceleration (A) = change in velocity (v) / time
A = (v2-v1) / time, when A = 2:
(v2-v1) = A×time = (2km/h•s)×1s = 2 km/h

when A = 4:
(v2-v1) = A×time = (4km/h•s)×1s = 4 km/h

when A = 10:
(v2-v1) = A×time = (10km/h•s)×1s = 10 km/h