7. In each of these sentences, one word is underlined. Tick ( \( \checkmark \) ) the box beside the correct meaning of the underlined word. a Gravity causes an object to fall. increases its mass makes it have weight makes it happen pulls it down 8. Calculate the weight of a 55 kg person on Earth. 10. Write down the mass of a 55 kg person on Earth. 11. Write down the mass of a 55 kg person on the Moon. 12. A television camera has a weight of 20 N on the Moon. Calculate its mass.

To solve the given problems: 1. In each of these sentences, one word is underlined. Tick ( \( \checkmark \) ) the box beside the correct meaning of the underlined word. - Gravity causes an object to fall. - increases its mass - makes it have weight - makes it happen - pulls it down 2. Calculate the weight of a 55 kg person on Earth. - The weight of an object is given by the formula: \( W = m \times g \), where \( m \) is the mass of the object and \( g \) is the acceleration due to gravity on Earth (approximately 9.8 m/s²). 3. Write down the mass of a 55 kg person on Earth. - The mass of an object is a measure of the amount of matter it contains and is constant regardless of the location. 4. Write down the mass of a 55 kg person on the Moon. - The mass of an object is constant regardless of the location. 5. A television camera has a weight of 20 N on the Moon. Calculate its mass. - The weight of an object is given by the formula: \( W = m \times g \), where \( m \) is the mass of the object and \( g \) is the acceleration due to gravity on the Moon (approximately 1.6 m/s²). Let's calculate the weight of a 55 kg person on Earth and the mass of a 55 kg person on the Moon. Calculate the value by following steps: - step0: Calculate: \(55\times 9.8\) - step1: Multiply the numbers: \(539\) The weight of a 55 kg person on Earth is 539 N. Now, let's calculate the mass of a 55 kg person on the Moon. Numbers by following steps: - step0: Solution: \(55\) The mass of a 55 kg person on the Moon is 55 kg. Next, let's calculate the mass of a television camera with a weight of 20 N on the Moon. Calculate the value by following steps: - step0: Calculate: \(\frac{20}{1.6}\) - step1: Convert the expressions: \(\frac{20}{\frac{8}{5}}\) - step2: Multiply by the reciprocal: \(20\times \frac{5}{8}\) - step3: Reduce the numbers: \(5\times \frac{5}{2}\) - step4: Multiply: \(\frac{5\times 5}{2}\) - step5: Multiply: \(\frac{25}{2}\) The mass of a television camera with a weight of 20 N on the Moon is 12.5 kg.