B the waves transfer energy from its source

**Answer:**

- <u>
**2.79 N**</u> - <u>
**8.34 N**</u> - <u>
**Watermelon**</u>

**Explanation:**

<u>Weight of soccer ball</u>

- Weight = mass (in kg) × gravitational force
- Weight = 284 x 10⁻³ x 9.81
- Weight = 0.284 x 9.81
- Weight = <u>
**2.79 N**</u> (approximately)

<u>Weight of watermelon</u>

- Weight = mass (in kg) x gravitational force
- Weight = 850 x 10⁻³ x 9.81
- Weight = 0.85 x 9.81
- Weight = <u>
**8.34 N**</u> (approximately)

As the <u>**watermelon**</u> has more weight, it will hit the ground first.

It depends on how much time 45 j will go, so if you told me that it went through 45 j per minute it will go through for 2 minutes so not efficient unless it went through 45 j per hour then it is efficient.

**Answer:**

45 N

**Explanation:**

Newton's second law says force is mass times acceleration.

F = ma

F = (15 kg) (3 m/s²)

F = 45 N