What acceleration does a car have if its speed has increased from 3 m / s to 32.4 km / h in 1 minute?
| July 29, 2021 | education
t = 1 min = 60 s.
V0 = 3 m / s.
V = 32.4 km / h = 9 m / s.
a -?
The acceleration of a body is a vector physical quantity that shows how the speed of the body’s movement changes over time.
The acceleration of the body a is determined by the formula: a = (V – V0) / t.
Let’s translate the final speed of the vehicle in the units of the International SI system: V = 32.4 km / h = 32.4 * 1000 m / 60 min = 32400 m / 60 * 60 s = 32400 m / 3600 s = 9 m / s.
a = (9 m / s – 3 m / s) / 60 s = 0.1 m / s2.
Answer: the car is moving with acceleration a = 0.1 m / s2.
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