Question

кинетическая энергия моторной лодки массой 104,5 кг движущейся со скоростью 6,8 м с равна кинетическая энергия игрушечного катера массой 3,6 кг Вычислите скорость игрушечного катера​

Answer 1

Ответ:

v≈36.64м/с

Объяснение:

Формула кинетической энергии: E=mv²/2

Энергии по условию равны, значит:

m1v1²=m2v2²

Подставляем:

104.5х6.8²=3.6v²

4832.08=3.6v²

v²=1342.2(4)

v≈36.64м/с

Answer 2

Calculating the kinetic energy of the motorboat and toy boat

The question asks us to calculate the kinetic energy of a motorboat with a mass of 104.5 kg moving at a speed of 6.8 m/s, and determine the speed of a toy boat with a mass of 3.6 kg that would have the same kinetic energy.

Kinetic energy is the energy an object possesses due to its motion. It is calculated as KE = 1/2 * m * v^2, where m is the mass of the object in kilograms and v is its speed in meters per second.

For the motorboat: - Mass (m) = 104.5 kg - Speed (v) = 6.8 m/s - Kinetic energy (KE) = 1/2 * 104.5 * (6.8)^2 = 2,232 J

For the toy boat: - Mass (m) = 3.6 kg - We want to find the speed (v) that gives the same kinetic energy of 2,232 J - Setting up the kinetic energy equation: 2,232 = 1/2 * 3.6 * v^2 - Solving for v: v = √(2,232 * 2 / 3.6) = 3 m/s

Therefore, the speed of the toy boat that would have the same kinetic energy as the motorboat is 3 m/s.