The car, approaching the slope, had a speed of 15 m / s and began to move with an acceleration

| March 22, 2021 | education

The car, approaching the slope, had a speed of 15 m / s and began to move with an acceleration of 0.5 m / s2. What speed will the car acquire in 0.5 min?

V0 = 15 m / s.

a = 0.5 m / s2.

t = 0.5 min = 30 s.

V -?

The acceleration of the body a shows how the speed of the body changes over time.

The acceleration of the body a is determined by the formula: a = (V – V0) / t, where V, V0 are the final and initial speed of movement, t is the time of speed change.

When the vehicle is moving up a slope: V = V0 – a * t.
V = 15 m / s – 0.5 m / s2 * 30 s = 0 m / s.

The vehicle will stop on an uphill slope.

When the vehicle is moving downhill: V = V0 + a * t.
V = 15 m / s + 0.5 m / s2 * 30 s = 30 m / s.

Answer: when driving on an upward slope, the car will stop; when moving upward, its speed will become V = 30 m / s.



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