Question

ДАЮ 25 БАЛОВ С ОБЪЯСНЕНИЕМ! Масса тела=1950кг. движется со скоростью V=108км/ч. Какую силу надо применить,что бы остановить потребуется 30 секунд?

Answer 1

Ответ:

1950 Н

Объяснение:

m=1950 кг    vo=30 м/с     t=30 c    F=?

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vk=0  (конечная скорость)

Ускорение пи торможении

|a|=(vk-vo)/t=30/30=1 м/с²

F=m*a=1950*1=1950 H

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Answer 2

Calculating the Force Required to Stop the Object

To calculate the force required to stop the object, we can use the formula:

Force = (mass * change in velocity) / time

Given: - Mass of the object = 1950 kg - Initial velocity (V) = 108 km/h - Time required to stop (t) = 30 seconds

First, we need to convert the velocity from km/h to m/s, as the standard unit for velocity in the formula is m/s.

1. Convert the velocity from km/h to m/s: - 1 km/h = 0.277778 m/s - Therefore, V = 108 km/h * 0.277778 m/s = 30 m/s

Now, we can calculate the change in velocity using the initial velocity and the time required to stop.

2. Calculate the change in velocity: - Change in velocity (Δv) = Final velocity - Initial velocity - As the object needs to come to a complete stop, the final velocity is 0 m/s. - Therefore, Δv = 0 m/s - 30 m/s = -30 m/s

Now, we can use the formula to calculate the force required to stop the object.

3. Calculate the force: - Force = (mass * change in velocity) / time - Force = (1950 kg * (-30 m/s)) / 30 s - Force = -1950 kg m/s²

Conclusion

To stop the object with a mass of 1950 kg, moving at a velocity of 108 km/h, in 30 seconds, a force of -1950 kg m/s² is required.