Question

Птах масою 600 г летить на висоті 14 м зі швидкістю 6 м/с. Визначте механічну енергію птаха в цей момент.

Answer 1

Температура воздуха примерно 12 -15 градусов

Answer 2

Calculation of Mechanical Energy

To determine the mechanical energy of the bird at the given moment, we need to consider both its potential energy and kinetic energy.

Potential Energy (PE) is the energy possessed by an object due to its position or height above the ground. It is given by the formula:

PE = m * g * h

where: - m is the mass of the bird (600 g = 0.6 kg) - g is the acceleration due to gravity (approximately 9.8 m/s^2) - h is the height of the bird above the ground (14 m)

Substituting the given values into the formula, we can calculate the potential energy of the bird:

PE = 0.6 kg * 9.8 m/s^2 * 14 m

PE = 82.32 Joules

Kinetic Energy (KE) is the energy possessed by an object due to its motion. It is given by the formula:

KE = (1/2) * m * v^2

where: - m is the mass of the bird (0.6 kg) - v is the velocity of the bird (6 m/s)

Substituting the given values into the formula, we can calculate the kinetic energy of the bird:

KE = (1/2) * 0.6 kg * (6 m/s)^2

KE = 10.8 Joules

Total Mechanical Energy

The total mechanical energy (ME) of the bird at the given moment is the sum of its potential energy and kinetic energy:

ME = PE + KE

ME = 82.32 Joules + 10.8 Joules

ME = 93.12 Joules

Therefore, the mechanical energy of the bird at the given moment is 93.12 Joules.

Please note that the calculations assume ideal conditions and neglect factors such as air resistance and energy losses due to friction.