Question

Мяч массой 450 г после удара футболиста поднялся на высоту 8 метров,а потом упал на землю. Определите работу силы тяжести,действующей на мяч

Answer 1

Сила тяжести приложена к мячу и направлена вниз, при g=10 mg=0,45*10=4,5H

Answer 2

Calculation of Work Done by the Force of Gravity on the Ball

To calculate the work done by the force of gravity on the ball, we need to use the formula:

Work = Force x Distance

In this case, the force acting on the ball is the force of gravity, and the distance is the height the ball is lifted.

Given: - Mass of the ball = 450 g = 0.45 kg - Height the ball is lifted = 8 meters

To calculate the work done by the force of gravity, we need to determine the force of gravity acting on the ball. The force of gravity can be calculated using the formula:

Force of Gravity = Mass x Acceleration due to Gravity

The acceleration due to gravity on Earth is approximately 9.8 m/s^2.

Let's calculate the force of gravity first:

Force of Gravity = 0.45 kg x 9.8 m/s^2

Now that we have the force of gravity, we can calculate the work done:

Work = Force of Gravity x Distance

Substituting the values:

Work = (0.45 kg x 9.8 m/s^2) x 8 meters

Calculating the result:

Work = 35.28 Joules

Therefore, the work done by the force of gravity on the ball is 35.28 Joules.