# The car picks up speed 20 meters per second in 10 seconds from the start of movement. With what acceleration did he move?

**The car picks up speed 20 meters per second in 10 seconds from the start of movement. With what acceleration did he move? after what time will its speed be equal to 108 km / h if it was moving with the same acceleration?**

V0 = 0 m / s.

t1 = 10 s.

V1 = 20 m / s.

V2 = 108 km / h = 30 m / s.

a -?

t2 -?

The acceleration of a body is a vector physical quantity that shows how quickly the body’s speed changes over time.

The acceleration of the body a is determined by the formula: a = (V1 – V0) / t1, where V1, V0 are the final and initial velocity of the body, t1 is the time of the velocity change.

a = (20 m / s – 0 m / s) / 10 s = 2 m / s2.

Since the acceleration of the car remains constant throughout the entire movement, then a = (V2 – V0) / t2.

t2 = (V2 – V0) / a.

t2 = (30 m / s – 0 m / s) / 2 m / s2 = 15 s.

Answer: the vehicle acceleration is a = 2 m / s2. , its speed V2 = 30 m / s will become in t2 = 15 s.