How long did it take for the vehicle speed to decrease from 20 to 12 m / s if it moved with
| September 2, 2021 | education
How long did it take for the vehicle speed to decrease from 20 to 12 m / s if it moved with an acceleration equal to 0.2 m / s2 in modulus?
V0 = 20 m / s.
V = 12 m / s.
a = 0.2 m / s2.
t -?
The acceleration of the body is called a vector physical quantity, which shows the rate of change in the speed of the body. The acceleration of the body a during deceleration is determined by the formula: a = (V0 – V) / t, where V0, V are the initial and final speeds, t is the time of speed change.
t = (V0 – V) / a.
t = (20 m / s – 12 m / s) / 0.2 m / s2 = 40 s.
Answer: the vehicle speed has decreased in time t = 40 s.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
