The car starts moving from a state of rest with an acceleration of 5m / s ^ 2.
| September 16, 2021 | education
The car starts moving from a state of rest with an acceleration of 5m / s ^ 2. How long does it take for the car to reach a speed of 72 km / h?
Initial data: movement from a state of rest (V0 (initial speed) = 0 m / s); a (acceleration with which the movement began) = 5 m / s2; V (the speed that the car must develop) = 72 km / h.
SI: V = 72 km / h = 20 m / s.
The time when the car reaches the required speed is determined from the formula: V = a * t and t = V / a.
Calculation: t = 20/5 = 4 s.
Answer: The car will reach the required speed in 4 seconds.
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