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Question 1 A)What information is needed to calculate the gravitational force of an object?(1 point) Responses the distance between the two objects the distance between the two objects the mass of the object subtracted from the distance between the object and the planet’s core the mass of the object subtracted from the distance between the object and the planet’s core the mass of the object and the planet’s gravitational acceleration the mass of the object and the planet’s gravitational acceleration the mass of the two objects the mass of the two objects Question 2 A) When interplanetary space travel becomes viable, doctors may suggest to people with arthritis that they vacation on a planet with lower gravitational attraction and do more walking. The gravitational acceleration on Earth is 9.8 m/s22, while the gravitational acceleration on Mars is 3.7 m/s22. How much less force would the vacationer be applying to their joints when walking on Mars? (1 point) Responses 6.1 times less force 6.1 times less force 36.26 times less force 36.26 times less force 2.6 times less force 2.6 times less force 13.5 times less force 13.5 times less force Question 3 A)Which of the following is true about the relationship between the gravitational force of Earth and the Moon?(1 point) Responses The Moon has a greater gravitational attraction than the Earth. The Moon has a greater gravitational attraction than the Earth. The Earth has identical gravitational attraction to that of the Moon. The Earth has identical gravitational attraction to that of the Moon. The Earth has a greater gravitational attraction than the Moon. The Earth has a greater gravitational attraction than the Moon. The Earth has no impact on the gravitational attraction of the Moon. The Earth has no impact on the gravitational attraction of the Moon. Question 4 A)A high school athlete is in the weight room training for wrestling season. He is trying to bench press a bar loaded with 100 kg. How much force must he exert to lift the loaded bar and overcome the force of gravity? Remember that a= 9.8 m/s22.(1 point) Responses 9800 N 9800 N 10.2 N 10.2 N 109.8 N 109.8 N 980 N 980 N Question 5 A) A group of extraterrestrial athletes travel from the Moon to Earth to train. How would the amount of force they exert to move change on Earth? (1 point) Responses The force needed to move on the Earth is less than the force needed to move on the moon. The force needed to move on the Earth is less than the force needed to move on the moon. The force needed would be less, so they would perform at a higher level. The force needed would be less, so they would perform at a higher level. The force would need to be greater, so they would not perform as well. The force would need to be greater, so they would not perform as well. The force would be the same. The force would be the same.

1 answer

Here are the answers to each of the questions provided:

Question 1 A) What information is needed to calculate the gravitational force of an object?
Answer: The mass of the two objects.
(Gravitational force is calculated using Newton's law of universal gravitation, which is \( F = G \frac{m_1 m_2}{r^2} \), where \( m_1 \) and \( m_2 \) are the masses of the two objects, \( G \) is the gravitational constant, and \( r \) is the distance between the centers of the two objects.)

Question 2 A) How much less force would the vacationer be applying to their joints when walking on Mars?
Answer: 2.6 times less force.
(Force is proportional to gravitational acceleration. The ratio of Earth's gravity (9.8 m/s²) to Mars' (3.7 m/s²) gives approximately \( \frac{9.8}{3.7} \approx 2.65 \), which can be rounded to 2.6 times less force.)

Question 3 A) Which of the following is true about the relationship between the gravitational force of Earth and the Moon?
Answer: The Earth has a greater gravitational attraction than the Moon.
(The gravitational force of the Earth is significantly greater than that of the Moon due to its larger mass.)

Question 4 A) How much force must the athlete exert to lift the loaded bar and overcome the force of gravity?
Answer: 980 N.
(Force can be calculated using the formula \( F = m \times g \), where \( m = 100 , kg \) and \( g = 9.8 , m/s² \), resulting in \( F = 100 \times 9.8 = 980 , N \).)

Question 5 A) How would the amount of force they exert to move change on Earth?
Answer: The force would need to be greater, so they would not perform as well.
(The gravitational force on Earth is greater than on the Moon, meaning the extraterrestrial athletes would need to exert more force to move on Earth compared to the Moon.)

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