Question

A bowling ball is traveling at 7.6 meters per second when it hits a pin. If the bowling ball has a mass of 6 kilograms, how much kinetic energy does it have when it hits the pin?

KE=12mv2

(1 point)
Responses

346.65 J
346.65 J

173.28 J
173.28 J

693.12 J
693.12 J

22.8 J

1 answer

To calculate the kinetic energy (KE) of the bowling ball, we can use the formula:

\[ KE = \frac{1}{2} mv^2 \]

Where:

  • \( m \) is the mass of the bowling ball (6 kg)
  • \( v \) is the velocity of the bowling ball (7.6 m/s)

Now, plug in the values:

\[ KE = \frac{1}{2} \times 6 \text{ kg} \times (7.6 \text{ m/s})^2 \]

First, calculate \( (7.6 \text{ m/s})^2 \):

\[ (7.6)^2 = 57.76 \text{ m}^2/\text{s}^2 \]

Now substitute back into the kinetic energy formula:

\[ KE = \frac{1}{2} \times 6 \times 57.76 \]

\[ KE = 3 \times 57.76 \]

\[ KE = 173.28 \text{ J} \]

Thus, the kinetic energy of the bowling ball when it hits the pin is 173.28 J.

So the correct response is:

173.28 J