The magnitude of the force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This law is known as ____________.
Universal Law of Gravitation
Coulombs law
Cavendish Law
Kepler's Law
2. Multiple Choice
30 seconds
1 pt
You have two objects with mass. If you double the mass of only one of the objects, how does that affect the magnitude of the gravitational force between them?
It doubles its original magnitude
It reduces it to a fourth of its original magnitude.
It quadruples its original magnitude
It reduces it to a half of its original magnitude.
3. Multiple Choice
30 seconds
1 pt
According to the Law of Universal Gravitation, how are force and distance related?
The force is inversely proportional to distance squared
The force is inversely proportional to distance
The force is directly proportional to distance
The force is directly proportional to distance squared
4. Multiple Choice
30 seconds
1 pt
If the Earth suddenly lost half of its mass, what would happen to the gravitational force between it and the moon?
The gravitational force would be cut in half.
The gravitational force would be four times smaller
The gravitational force would double.
The gravitational force would remain the same.
5. Multiple Choice
30 seconds
1 pt
How does halving the distance between two objects affect the gravitational force between them?
It quadruples its original magnitude
It reduces it to a half of its original magnitude.
It doubles its original magnitude
It reduces it to a fourth of its original magnitude.
6. Multiple Choice
30 seconds
1 pt
Which of the following helped calculate Earth’s mass?
Cavendish’s Experiment
The Inverse Square Law
Kepler’s First Law
Kepler’s Third Law
7. Multiple Choice
30 seconds
1 pt
What do Kepler's Laws explain?
Planetary motion
Weightlessness
Tides
Black holes
8. Multiple Choice
1 minute
1 pt
Two asteroids, each with a mass of 100,000kg and 500,000kg respectively, are separated by a distance of 4m. What is the gravitational force felt by each asteroid?
0.208N
0.220N
0.198N
0.214N
9. Multiple Choice
1 minute
1 pt
Two bowling balls, each with a mass of 5kg, are separated by a distance of 1m. What is the gravitational force felt by each bowling ball?
1.67E-9 N
2.22E-9 N
1.12E-9 N
1.59E-9 N
10. Multiple Choice
30 seconds
1 pt
How does doubling the distance between two objects affect the force of gravitational attraction between them?
It reduces it to a fourth of its original magnitude.
It doubles its original magnitude
It quadruples its original magnitude
It reduces it to a half of its original magnitude.
11. Multiple Choice
30 seconds
1 pt
Your weight __________ as you move away from Earth’s center.
Decreases
Increases
Becomes zero
Does not change
12. Multiple Choice
30 seconds
1 pt
In circular motion, the centripetal force is always directed ________
Towards the center
Tangent to circular path
Away from the center
Perpendicular to the circular plane
13. Multiple Choice
45 seconds
1 pt
Which of the following is the correct formula for centripetal acceleration?
14. Multiple Choice
2 minutes
1 pt
A 1200-kg car moving at 15m/s takes a turn in a circular path with a radius of 25.0 m. Determine the net force acting upon the car.
10,800 N
9 N
450,000 N
375 N
15. Multiple Choice
2 minutes
1 pt
A 1200 kg car moving at 15 m/s takes a turn around a circle with a radius of 25.0 m. Determine the centripetal acceleration acting upon the car.
9 m/s²
450000 m/s²
375 m/s²
108000 m/s²
16. Multiple Choice
2 minutes
1 pt
John flies his model plane in a circular motion by holding onto a string and swinging his plane around. The circular motion has a radius of 40 m, and the 8kg plane moves at 22 m/s. What is the tensional force John feels from the string?
96.8 N
4.4 N
12 N
16 N
17. Multiple Choice
30 seconds
1 pt
Which has greater linear speed: a horse near the outside rail of a merry-go-round or a horse near the inside rail?
the outside horse
the inside horse
they are travelling at the same speed
18. Multiple Choice
1 minute
1 pt
What is the velocity of an object that accelerates at 4.6 m/s² in a circle with a radius of 3 m?
3.71 m/s
13.80 m/s
1.53 m/s
9.81 m/s
19. Multiple Choice
30 seconds
1 pt
The orbit of each planet is a(n) __________, with the Sun at one focus.
ellipse
circle
torus
platonic solid
20. Multiple Choice
45 seconds
1 pt
Which of the following is the correct formula for centripetal force?