Question

велосипедист движется по закруглению дороги радиусом 50 м со скоростью 36 км/ч с каким ускорением он проходит закругление? какова действующая на его колеса сила трения , выполняющая роль центростремительной силы если его масса велосипедиста 60 кг?

Answer 1

Ответ:

Велосипедист проходит закругление с центростремительным ускорением 2 м/с².

Сила трения, действующая на колёса велосипеда, 120 Н.

Объяснение:

R = 50 м

v = 36 км/ч = 10 м/с

m = 60 кг

------------------------

a  - ?

Fтр - ?

------------------------

Центростремительное  ускорение

$a = \dfrac{v^2}{R} = \dfrac{10^2}{50} = 2~(m/c^2)$

Сила трения

Fтр = ma = 60 · 2 = 120 (H)

Answer 2

Calculation of Acceleration:

To calculate the acceleration of the cyclist as they move along the curved road, we can use the formula for centripetal acceleration:

Centripetal acceleration (a) = (v^2) / r

Where: - v is the velocity of the cyclist - r is the radius of the curved road

In this case, the velocity of the cyclist is given as 36 km/h, which needs to be converted to m/s. The radius of the curved road is given as 50 m.

Converting the velocity from km/h to m/s: - 36 km/h = 36 * (1000/3600) m/s = 10 m/s

Now we can substitute the values into the formula to calculate the centripetal acceleration:

a = (10^2) / 50 = 1 m/s^2

Therefore, the cyclist passes through the curved road with an acceleration of 1 m/s^2.

Calculation of Frictional Force:

To calculate the frictional force acting on the wheels of the bicycle, we can use the formula for centripetal force:

Centripetal force (F) = (m * v^2) / r

Where: - m is the mass of the cyclist - v is the velocity of the cyclist - r is the radius of the curved road

In this case, the mass of the cyclist is given as 60 kg, the velocity is 36 km/h (converted to 10 m/s), and the radius of the curved road is 50 m.

Substituting the values into the formula:

F = (60 * 10^2) / 50 = 120 N

Therefore, the frictional force acting on the wheels of the bicycle, which serves as the centripetal force, is 120 N.

Please note that the above calculations are based on the given information and assumptions.