How many times is the kinetic energy of a car with a mass of m1 = 1500 kg, moving at a speed of 120 km / h

| May 26, 2021 | education

How many times is the kinetic energy of a car with a mass of m1 = 1500 kg, moving at a speed of 120 km / h, more than the kinetic energy of a truck with a mass of m2 = 4800 kg, which is moving at a speed of 54 km / h?

If the body is at rest, its kinetic energy is zero.

The kinetic energy of a body (Ekin) depends on the mass of the body (m) and on the speed of its movement (v).

Kinetic energy is directly proportional to the mass of the body and the square of its speed.

Determine the kinetic energy by the formula:

Ekin = m⋅u2 / 2.

To calculate mass or velocity, the formula is transformed as follows:

m = 2⋅Ekin / u2 and Vu = 2⋅Ekin / m

With an increase in body weight, its kinetic energy also increases in a linear relationship.

If the mass doubles, then the kinetic energy also doubles.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.