12th
grade

Physics

75%

accuracy

180

plays

neal lasta

3 years

Physics

12th

grade

Newton's Law of Universal Gravitation

neal lasta

180
plays

29 questions

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1. Multiple Choice
30 seconds
1 pt
What is weight?
The amount of matter an object has
The measure of an object's inertia
The gravitational force that attracts objects near Earth's surface
9.8 m/s²
2. Multiple Choice
30 seconds
1 pt
Which property is directly proportional to the gravitational force between two particles?
mass 1 only
mass 2 only
center-to-center distance between the two particles
mass 1 and mass 2
3. Multiple Choice
30 seconds
1 pt
If r is the center-to-center distance between m1 and m2, then the gravitational force between them is
is directly proportional to r
is directly proportional to r²
is inversely proportional to r
is inversely proportional to r²
4. Multiple Choice
30 seconds
1 pt
How does F_g(2 on 1) compared with F_g (1 on 2)?
They have the same magnitudes but opposite directions
They have the same directions but opposite magnitudes
They have the same magnitudes and directions
They have opposite magnitudes and directions
5. Multiple Choice
30 seconds
1 pt
Here mass 1 is clearly bigger than mass 2. Compare their forces.
The magnitude of the force on mass 1 is bigger than on mass 2
The magnitude of the force on mass 2 is bigger than on mass 1
The magnitude of the force on both mass 1 and mass 2 are the same
This question is sponsored by Milcu Deodorant Powder
6. Multiple Choice
30 seconds
1 pt
Which of the following is the value of the Gravitational constant, G (to 3 sig figs)
6.67 x 10^-10 Nm²/kg²
6.67 x 10^-11 Nm²/kg²
-9.8 m/s²
9.8 m/s²
7. Multiple Choice
30 seconds
1 pt
If we double the mass of m₁ and triple the mass of m₂, while keeping r the same, what happens to their F_g?
5 times greater
6 times greater
reduced by 1/5
reduced by 1/6
8. Multiple Choice
2 minutes
1 pt
If m₁ and m₂ have the same radius R, and r = 8R, then what happens to the gravitational force between them if the masses are kept constant, but they are brought closer so that they touch?
reduced by 1/4
reduced by 1/16
4 times greater
16 times greater
9. Multiple Choice
1 minute
1 pt
if m₁ = 2 kg, and m₂ = 1 kg, and r = 1 m, then what is F_g between them?
G Newtons
1/2 G Newtons
2G Newtons
3G Newtons
4G Newtons
10. Multiple Choice
2 minutes
1 pt
If m₁ = 1 kg, m₂ = 2 kg, and r = 2 m, then what is the magnitude of the initial acceleration of m₁?
$2Gm_1$
$4Gm_1$
$\frac{G}{2m_1}$
$\frac{G}{4m_1}$
11. Multiple Choice
30 seconds
1 pt
If m₁ = 2 kg, m₂ = 9 kg, and r = 3 m , then what is the magnitude of the initial acceleration of m₂?
$\frac{G}{2m_2}$
$\frac{G}{4m_2}$
$\frac{2G}{m_2}$
$\frac{4G}{m_2}$
12. Multiple Choice
30 seconds
1 pt
m₁ and m₂ are spheres. For the law of Universal Gravitation to hold,
The mass of each sphere must be symmetrically evenly distributed
The mass of both spheres must be the same
Both spheres must have the same radii
The separation distance must be a whole number value
13. Multiple Choice
30 seconds
1 pt
If we keep m₁ fixed, and allow m₂ to move, at which direction will m₂ move?
North
South
East
West
14. Multiple Choice
30 seconds
1 pt
Continuation. What can you say about the magnitude of the linear velocity of m₂ as it moves towards m₁?
it is constant
it is changing
it is zero
it is directed East
15. Multiple Choice
45 seconds
1 pt
Continuation. What can you say about the gravitational force between m₁ and m₂ as m₂ starts moving towards m₁?
F_g increases
F_g decreases
F_{g is constant}
F_g is zero
16. Multiple Choice
30 seconds
1 pt
You have two masses, the blue and grey in the far corners of space. In which situation is the gravitational force between them stronger?
Situation A
Situation B
both have the same gravitational force
I like peanuts
17. Multiple Choice
30 seconds
1 pt
Continuation. What can you say about the acceleration of m₂ as it moves towards m₁?
acceleration is zero
acceleration is non-zero but constant
acceleration is changing
acceleration is negative
18. Multiple Choice
45 seconds
1 pt
If the mass of the Earth is labeled m_E, the mass of object A is m, and the radius of the Earth is R, then what is the gravitational force between them?
$\frac{Gm_Em}{R}$
$\frac{Gm_Em}{R^2}$
$\frac{G\left(m_E+m\right)}{R}$
$\frac{G\left(m_E+m\right)}{2R}$
19. Multiple Choice
30 seconds
1 pt
Continuation. If object A is lifted one Earth radii above the Surface, then what is the gravitational force between them?
$\frac{2Gm_Em}{R^2}$
$\frac{4Gm_Em}{R^2}$
$\frac{Gm_Em}{2R^2}$
$\frac{Gm_Em}{4R^2}$
20. Multiple Choice
30 seconds
1 pt
Three masses fixed in space form a right triangle. Which arrow best represents the direction of the net gravitational force acting on mass 2?
21. Multiple Choice
30 seconds
1 pt
Continuation. Which arrow best represents the net gravitational force acting on m₁?
22. Multiple Choice
1 minute
1 pt
If r₁₂ = r₁₃, then what angle does the gravitational force that m₁ experiences due to m₃ make with the +x-axis?
0^o
30^o
45^o
60^o
23. Multiple Choice
1 minute
1 pt
if m₁ < m2 < m₃, then where (in the line joining the centers of the three masses) can m₂ be placed such that the net gravitational force acting on it is zero?
closer to mass 1
closer to mass 2
right in the middle of m₁ and m₂
24. Multiple Choice
30 seconds
1 pt
Continuation. If m₂ is placed in the middle of m₁ and m₃, then what is the direction of the net gravitational force acting on m₂?
North
South
East
West
25. Multiple Choice
1 minute
1 pt
The planet Saturn has about 100 times the mass of the Earth and is about 10 times farther from the sun than the Earth is. Compared to the acceleration of the Earth caused by the sun's gravitational pull, how great is the acceleration of Saturn due to the sun's gravitation?
100 times greater
10 times greater
the same
1/10 as great
1/100 as great
26. Multiple Choice
30 seconds
1 pt
Two objects, one with a mass of m and one with a mass of 4m are attracted to each other by a gravitational force. If the force on 4m is F, what is the force of mass m in terms of F?
16F
4F
F
1/4 F
27. Multiple Choice
30 seconds
1 pt
If the mass of the Earth increased, with no change in radius, your weight would
stay the same
decrease
increase also
28. Multiple Choice
45 seconds
1 pt
If the radius of the Earth decreased, with no change in mass, your weight would
not change
increase
decrease
29. Multiple Choice
1 minute
1 pt
What event will produce the greatest increase in the gravitational force between two masses?
Doubling the large mass
Doubling the distance between the masses
Reducing the small mass by half
Reducing the distance between the masses by half
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