Question

Определите ускорение санок скатывающиеся с горки высотой 2 метра и длиной 4 метров трением и сопротивлением воздуха пренебречь

Answer 1

Из закона сохранения энергии можно найти скорость санок у подножия горки
Ek=Ep
mv²/2=mgh
v=√2gh=√2×10×2=√40=6.3м/с
из формулы перемещения без времени движения найдем ускорение
S=(v²-v₀²)2a, начальная скорость 0
a=v²/2S=40/2×4=5 м/с²

Answer 2

Calculation of Acceleration of Sleds Rolling Down a Hill

To determine the acceleration of sleds rolling down a hill, we need to consider the effects of gravity, friction, and air resistance. Given that the sleds are rolling down a hill with a height of 2 meters and a length of 4 meters, we can calculate the acceleration by considering the forces acting on the sleds.

1. Gravitational Force: The force of gravity acts on the sleds and causes them to accelerate down the hill. The gravitational force can be calculated using the formula:

F_gravity = m * g

Where: - F_gravity is the gravitational force - m is the mass of the sleds - g is the acceleration due to gravity (approximately 9.8 m/s^2)

However, the mass of the sleds is not provided in the question. Without the mass, we cannot calculate the gravitational force or the resulting acceleration. Please provide the mass of the sleds so that we can proceed with the calculation.

If you have any other questions or need further assistance, feel free to ask!