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if a 3.0 kg toy is moving at 4.0 m/s then what would be kentic energy of the cart is moving twice as faster

User KatyB
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1 Answer

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14 votes

It tells us that a toy has a mass of 3.0 kg, with a speed of 4.0 m/s.

We apply the following formula:

Ec = m * v²/2

We replace data and solve:

Ec = 3.0 kg* (4.0 m/s)²

Ec = 3.0 kg* 16 m²/s²/2

Ec = 48 kg * m²/s²/2

Ec = 24 kg * m²/s²

Ec = 24 N * m ========> Joules units

Ec = 24 J

The new cartia of the cart would be of 24 joules.

User Kenlly Acosta
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