Question

Импульс тела равен 10кг · м/с, а кинетическая энергия 20 Дж. Скольки равна суорость тела?

Answer 1

Дано:
p = 10кг · м/с
Ek = 20 Дж
___________
v - ?

Решение:

Ответ: 4 м/с

Answer 2

P=mv    E=(mv^2)\2
v=p\m=   v^2=2E\m=p^2\m^2

2Em=p^2
m=p^2\2E=100\40=2.5 кг
v=p\m=10\2,5=4 м\с

Answer 3

Calculation of Velocity

To find the velocity of an object, we can use the formula for kinetic energy:

Kinetic Energy (Ek) = 1/2 * mass * velocity^2.

Given that the kinetic energy (Ek) is 20 J and the mass of the object is 10 kg, we can rearrange the formula to solve for velocity:

20 J = 1/2 * 10 kg * velocity^2

Simplifying the equation, we have:

20 J = 5 kg * velocity^2

Dividing both sides of the equation by 5 kg, we get:

4 J/kg = velocity^2

Taking the square root of both sides, we find:

velocity = √(4 J/kg) = 2 m/s

Therefore, the velocity of the object is 2 m/s.