Question

По горизонтальному столу катится шарик массой 500г с постоянной скоростью 20см/с.Чему равна его кинетическая энергия?

Answer 1

Eк=mv^2

Eк=500г*0,04м/с=2Дж

Answer 2

Calculating Kinetic Energy

To calculate the kinetic energy of the rolling ball, we can use the formula for kinetic energy:

Kinetic Energy (KE) = 0.5 * mass * velocity^2

Given: - Mass (m) = 500g = 0.5kg - Velocity (v) = 20cm/s = 0.2m/s

Plugging these values into the formula: KE = 0.5 * 0.5kg * (0.2m/s)^2

This gives us: KE = 0.5 * 0.5 * (0.04) KE = 0.1 Joules

So, the kinetic energy of the rolling ball with a mass of 500g and a constant speed of 20cm/s is 0.1 Joules.