# What kinetic energy does a body weighing 10 g have at a speed of 36 km / h?

March 26, 2021 | education

| Given:

m = 10 g,

v = 36 km / h.

To find. Ek.

Let’s write down the formula for kinetic energy.

Eк = (mv ^ 2) / 2.

Let’s give the units of measurement in the SI system.

m = 10 g = 0.01 kg.

v = 36 km / h = 10 m / s.

Let’s calculate the kinetic energy by the formula.

Ek = (0.01 * 100) / 2 = 0.5 J

Let’s check the units.

Ek = 1 (kg * (m / s) ^ 2) = 1kg * 1m ^ 2 / 1c ^ -2 = 1H * 1m = 1J.

Answer: The kinetic energy of a body weighing 10 g at a speed of 36 km / h is 0.5 J.

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