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 and the planet’s gravitational acceleration
the mass of the object and the planet’s gravitational acceleration
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 two objects
the mass of the two objects
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/s 2
, while the gravitational acceleration on Mars is 3.7 m/s 2
. 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
13.5 times less force
13.5 times less force
2.6 times less force
The correct response is 2.6 times less force.
Which of the following is true about the relationship between the gravitational force of Earth and the Moon?(1 point)
Responses
The Earth has no impact on the gravitational attraction of the Moon.
The Earth has no impact on the gravitational attraction of the Moon.
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 correct response is "The Earth has a greater gravitational attraction than the Moon."
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/s 2
.(1 point)
Responses
109.8 N
109.8 N
980 N
980 N
9800 N
9800 N
10.2 N
The correct response is 9800 N.
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 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 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 be the same.
The force would be the same.
The force needed to move on the Earth is less than the force needed to move on the moon.