Question

Please help.

A tennis ball weighing 0.5 kg is served across the tennis court and hits at a velocity of 3m/s. A bowling ball weighing 7 kg is rolled down an alley at 2 m/s. Which object has more kinetic energy? Explain your answer using scientific evidence and reasoning.

Answer 1

Answer:

The bowling ball has more kinetic energy than the tennis ball

Explanation:

Using the formula 1/2 mass × acceleration we found that the tennis ball had a kinetic energy of 0.75 while the bowling ball had a kinetic energy of 10.5 hence the bowling ball has the ability to do more work

Answer 2

The bowling ball has more kinetic energy than the tennis ball.

Given the following data:

• Mass of tennis ball = 0.5 kg.

• Velocity of tennis ball = 3m/s.

• Mass of bowling ball = 7 kg.

• Velocity of bowling ball = 2 m/s.

How to calculate kinetic energy.

Mathematically, kinetic energy is given by this formula:

$K.E = \frac{1}{2} MV^2$

Where:

• K.E is the kinetic energy.

• M is the mass.

• V is the velocity.

For tennis ball:

$K.E = \frac{1}{2} \times 0.5 \times 3^2\\\\K.E = \frac{1}{2} \times 0.5 \times 9$

K.E = 2.25 Joules.

For bowling ball:

$K.E = \frac{1}{2} \times 7 \times 2^2\\\\K.E =3.5 \times 4$

K.E = 14 Joules.

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