Question

An electric car is being driven through a town at 22 m/s. The kinetic energy of the car is 222640 J. Calculate the mass of the car

Answer 1

The mass of the car is 40 kg.

Step-by-step explanation:

The formula to calculate the kinetic energy of an object is KE = (1/2) * m * v^2, where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.

In this case, we are given the kinetic energy of the car (222,640 J) and the velocity of the car (22 m/s). We can rearrange the formula to solve for the mass of the car:

222,640 = (1/2) * m * 22^2

Simplifying the equation:

222,640 = 11 * m * 484

Dividing both sides by 484:

m = 222,640 / (11 * 484)

Calculating the mass:

m = 40 kg

Answer 2

920 kg

Step-by-step explanation:

`kinetic \: energy = 222640j \\ (1)/(2) mv {}^(2) = 222640 \\ (1)/(2) m(22) {}^(2) = 222640 \\ m = 920kg`