A security guard walks at a steady pace, traveling 120 mm in one trip around the perimeter of a building. It takes him 230 ss to make this trip. what is his speed.

Question

Allison

Physics

20 May, 01:13

A security guard walks at a steady pace, traveling 120 mm in one trip around the perimeter of a building. It takes him 230 ss to make this trip. what is his speed.

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Answers (1)

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Alexis Ayers · Answer 1

0.0005217 m/s or 5.217*10⁻⁴ m/s

Explanation:

Speed: This can be defined as the ratio of the distance covered by a body to the time taken to cover that distance. The S. I unit of speed is m/s. Speed is a scalar quantity, because it can only be represented by magnitude only.

Mathematically, speed is expressed as

S = d/t ... Equation 1

Where S = speed, d = total distance, t = time taken to cover the distance

Given: d = 120 mm = (120/1000) m = 0.12 m, t = 230 s.

Substituting into equation 1

S = 0.12/230

S = 0.0005217 m/s

Hence the speed of the security guard = 0.0005217 m/s or 5.217*10⁻⁴ m/s