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3 years ago

1. What is the kinetic Energy of a 1500kg object moving at 21 m/s?

1 answer:

8 0

The formula for working out kinetic energy is

=122

KE = kinetic energy
m = mass of a body
v = velocity of a body

kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.

For the first one I think :
Answer:
KE = 330750 J

I’m not sure about the second one- sorry

The third is
Answer:
KE = 41454 J

Hope it helps and it is correct, sorry if it isn’t !

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Answer:

0.35 kg

Explanation:

8 cm = 0.08 m

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Let mass of the block be M, then the gravity would be Mg

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For example, when there is no coin, block is $h_0 = 0.0312m$ submerged. The weight of water displaced must be

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$h = \frac{M}{A\rho} + \frac{m}{A\rho}$

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$\frac{1}{A\rho} = 0.089$

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Answer:

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good luck

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