Question

Здравствуйте! Помогите пожалуйста с Физикой! Как изменяется кинетическая энергия львицы массой 151 кг во время охоты, если она снизит скорость бега с 10 м/с до 6 м/с И нужно вставит: Уменьшилась/Увеличилась на . . . Дж

Answer 1

Ответ:

Кинетическая энергия снизится на 3850,5 Дж

Объяснение:

Е к=mv²/2

Eк1=151*10²/2=7550Дж

Ек2=151*7²/2=3699,5Дж

∆Ек=7550-3669,5=3850,5Дж

Answer 2

Changes in Kinetic Energy during Lioness Hunting

When a lioness with a mass of 151 kg reduces her running speed from 10 m/s to 6 m/s during hunting, we can determine how her kinetic energy changes.

Kinetic energy (KE) is given by the equation:

KE = (1/2) * mass * velocity^2

Let's calculate the initial and final kinetic energies and determine how they compare.

Initial kinetic energy: - Mass of the lioness = 151 kg - Initial velocity = 10 m/s

Using the formula, we can calculate the initial kinetic energy:

KE_initial = (1/2) * 151 kg * (10 m/s)^2

Now, let's calculate the final kinetic energy: - Final velocity = 6 m/s

Using the formula, we can calculate the final kinetic energy:

KE_final = (1/2) * 151 kg * (6 m/s)^2

To determine how the kinetic energy changed, we can compare the initial and final kinetic energies.

Calculation of Kinetic Energy Change

Let's calculate the initial and final kinetic energies and determine how they compare.

Initial kinetic energy: - Mass of the lioness = 151 kg - Initial velocity = 10 m/s

Using the formula, we can calculate the initial kinetic energy:

KE_initial = (1/2) * 151 kg * (10 m/s)^2

Final kinetic energy: - Mass of the lioness = 151 kg - Final velocity = 6 m/s

Using the formula, we can calculate the final kinetic energy:

KE_final = (1/2) * 151 kg * (6 m/s)^2

Now, let's substitute the values and calculate the kinetic energies.

KE_initial = (1/2) * 151 kg * (10 m/s)^2 = 7,550 J

KE_final = (1/2) * 151 kg * (6 m/s)^2 = 2,718 J

Comparison of Initial and Final Kinetic Energies

The initial kinetic energy of the lioness during hunting is 7,550 J, while the final kinetic energy is 2,718 J.

To determine how the kinetic energy changed, we can compare the initial and final values.

The kinetic energy decreased from 7,550 J to 2,718 J during the lioness's hunting.

Please let me know if there is anything else I can help you with!