One car, moving at a speed of 24 m / s for 20 s, covered the same distance as the other in 30 s.
| September 4, 2021 | education
One car, moving at a speed of 24 m / s for 20 s, covered the same distance as the other in 30 s. What is the speed of the second car?
To solve this problem, we use the definition of speed: speed is a physical quantity that is equal to the path that the body travels per unit of time, that is:
v = l / t,
where l is the path, t is the time.
find the path that the first car passed, for this, from the above formula, we find l:
l = v * t.
Substitute the numerical values:
l1 = v1 * t1 = 24 * 20 = 480 (m).
From the problem statement
l1 = l2.
Using the first formula to determine the speed, we find the speed of the second car:
v2 = l2 / t2 = l1 / t2 = 480/30 = 16 (m / s).
Answer: v2 = 16 (m / s).
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