The car moving away from the place of movement with an acceleration of 3m / s ^ 2. In 4 s the speed of the car will be …
| February 17, 2021 | education
V0 = 0 m / s.
a = 3 m / s2.
t = 4 s.
V -?
The acceleration of a body is a vector physical quantity that shows how the speed of the body changes over time. The acceleration of the car a is expressed by the formula: а = (V – V0) / t, where V is the final speed of movement, V0 is the initial speed of movement, t is the time of speed change.
The final speed V will be determined by the relationship: V = V0 + a * t.
Since the car starts to move, the formula will take the form: V = a * t.
V = 3 m / s2 * 4 s = 12 m / s.
Answer: after a time t = 4 s from the start of movement, the car will have a speed of V = 12 m / s.
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