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1 month ago

A 600 kg car is at rest, and then accelerates to 5 m/s.

Physics

1 answer:

ValentinkaMS [3.4K]1 month ago

3 0

Answer:

7500J

Explanation:

Provided details:

Weight of car = 600kg

Speed = 5m/s

Unknown variables:

Initial kinetic energy =?

Final kinetic energy =?

Work performed =?

Solution method:

Kinetic energy relates to the energy associated with a body's motion.

This can be expressed mathematically as follows:

K.E = $\frac{1}{2}$ m v²

where m denotes mass

and v signifies velocity

Initial kinetic energy:

Since the car began at rest, v = 0, so K.E = 0

Final kinetic energy:

K.E = $\frac{1}{2}$ x 600 x 5² = 7500J

Work done:

Work done = Final K.E - Initial K.E = 7500 - 0 = 7500J

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