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Sagot :
Answer:
4.617 s
Explanation:
The speed of 60 mi/h can be converted to m/s:
(60 mi/h) × (1609.344 m/mi) × (1 h)/(3600 s) = 26.8244 m/s
The relationship between speed and acceleration is ...
v = at
t = v/a = (26.8244 m/s)/(5.81 m/s²) ≈ 4.617 s
It will take the car 4.617 seconds to reach 60 mi/h starting from rest.
Answer:
4.62 s
Explanation:
We have 3 known variables and 1 unknown variable that we want to solve for.
- a = 5.81 m/s²
- v₀ = 0 m/s
- v = 60.0 mi/h
- t = ?
Convert 60 mi/h to m/s.
- 60 mi/h -> 26.8224 m/s
Use the kinematic equation that contains all four of these variables.
- v = v₀ + at
- 26.8224 = 0 + (5.81)t
- 26.8224 = 5.81t
- t = 4.61659208262
It takes the car 4.62 seconds to reach a velocity of 60 mi/h (26.82 m/s) if it starts from rest.
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