Question

Лыжник скатывается с горки ,двигаясь прямолинейно и равноускоренно .за время спуска скорость лыжника увеличилась на 7,5 м/с. ускорение лыжника 0,5 м/с^2.сколько времени длится спуск?

Answer 1

v = at

 

t = 7.5/0.5 =15 секунд

Answer 2

Calculation of the Time of Descent

To calculate the time of descent for the skier, we can use the equation of motion for uniformly accelerated linear motion:

v = u + at

Where: - v is the final velocity - u is the initial velocity - a is the acceleration - t is the time

In this case, the skier's initial velocity (u) is 0 m/s because they start from rest. The acceleration (a) is given as 0.5 m/s^2, and the change in velocity (v - u) is 7.5 m/s.

Substituting the given values into the equation, we can solve for the time (t):

7.5 = 0 + 0.5t

Simplifying the equation:

7.5 = 0.5t

To isolate t, we divide both sides of the equation by 0.5:

t = 7.5 / 0.5

Calculating the value:

t = 15 seconds

Therefore, the time of descent for the skier is 15 seconds.