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WorksheetsUniversal Gravitation Check Point Quiz
Total questions: 35
Worksheet time: 9hrs 45mins
A 3000-kg car is traveling around a flat circular track with a radius of 2500-m. The car is driving at 37-m/s. What force provides the centripetal force keeping the car in the curve?
Gravity
Normal Force
Friction between the tires and the road
Tension in the road
What provides the centripetal force for a planet orbiting a star?
No centripetal force is needed since the planet was moving already.
The planet’s inertia.
Tension
Gravity
If you whirl a ball in a circle above your head on a string. What force provides the centripetal force?
Gravity
Tension in the rope
Air resistance
Normal force
A 25 kg object is placed 4.5 m from a 35 kg object. Find the gravitational force between these two objects.
2.9 x 10-9 N
194 N
43 N
1.3 x 10-8 N
What does Newton's Third Law tell us about the gravitational forces between two objects?
The gravitational of first object on the second will be the same size as the gravitational pull of the second object on the first, but will be in the opposite direction.
The gravitational of first object on the second will be the less than the size of the gravitational pull of the second object on the first, but will be in the opposite direction.
The gravitational of first object on the second will be the greater than the size of the gravitational pull of the second object on the first, but will be in the opposite direction.
The gravitational of first object on the second will be the same size as the gravitational pull of the second object on the first, and will be in the same direction.
The gravitational of first object on the second will be the less than the size of the gravitational pull of the second object on the first, and will be in the same direction.
The table shows the gravitational field strength on surface of three mythical planets. If we know that each of the planets in the table have the same radius, which planet must have the most mass?
Arrakis
Caladan
Giedi Prime
They allmust have the same mass.
The table shows the gravitational field strength on surface of three mythical planets. If we know that each of the planets in the table have the same mass, which planet must have the greatest radius?
Arrakis
Caladan
Giedi Prime
They allmust have the same mass.
We know that the earth and moon pull on each other gravitationally. Which statement below is true about the magnitude of these two gravitational forces?
The earth pulls on the moon with a greater gravitational force than the moon pulls on the earth.
The earth and moon pull each other with the same size gravitational force.
The earth pulls on the moon with less gravitational force than the moon pulls on the earth.
The earth pulls on the moon with a gravitational force, but the moon doesn't pull on the earth.
Which graph best describes the relationship between the Earth's gravitational force on an object and the object's distance from the center of the earth?
The gravitational force between two objects is 100 N. Find the new gravitational force between the objects if the mass of one of the objects doubles.
25 N
50 N
100 N
200 N
The gravitational force between two objects is 100 N. Find the new gravitational force between the objects if both masses doubled and the distance between them also doubled.
25 N
50 N
100 N
200 N
A 5000-kg space probe is orbiting a 7.25 X 1027-kg planet. Which statement about the magnitude of the forces between the planet and the probe is true?
The gravitational pull of the planet on the probe has the same magnitude as the gravitational pull of the probe on the planet.
The gravitational pull of the planet on the probe has a greater magnitude than the gravitational pull of the probe on the planet.
The gravitational pull of the planet on the probe has a smaller magnitude than the gravitational pull of the probe on the planet.
The gravitational pull of the planet on the probe has a larger magnitude than the gravitational pull of the probe on the planet when the probe is on the “day” side of the planet, but a smaller magnitude gravitational pull when it is on the “night” side of the planet.
The gravitational pull between two objects is 450-N. If the distance between them doubles what will the new gravitational force between the two objects be?
112.5 N
225 N
900 N
1800 N
What is the gravitational force on a 65-kg person standing on the surface of the Earth?
65 N
9.8 N
637 N
6.67 X 10-11 N
According to the General Theory of relativity, how does gravity work?
There is a physical "string" attached to all objects in the universe that is pulled when gravity acts.
It is basically a magnetic force.
Objects with mass warp the space around them causing objects travelling through these warped regions of space to follow a curved path which makes it look like they are being pulled in.
It is a combination of electrical and magnetic forces.
If Einstein’s General Theory of Relativity is correct, what would it predict about the observed position of a star located by the Sun if it could be seen during a solar eclipse?
The star would be observed in the exact position it actually is.
The star would be observed in a different position than where it actually is.
The star would be observed on the opposite side of the Earth.
The star would not be observed.
How is GPS (Global Positioning Satellite) evidence that supports Einstein’s General Theory of Relativity?
GPS has nothing to do with the General Theory of Relativity.
GPS is a tool which has successfully mapped the warping of space.
GPS measures the strength of gravity around the Earth.
GPS only worked after the engineers accounted for Einstein’s General Theory of Relativity.
Why doesn’t the Earth fly away from the Sun?
The Sun’s gravitational pull on the Earth cancels out the Earth’s gravitational pull on the Sun so the Earth maintains its orbit.
The Sun’s magnetic pull on the Earth keeps it in orbit.
The Sun’s gravitational pull on the Earth keeps it in orbit.
The gravitational pull of Jupiter on the Earth keeps it in orbit.
Since the Moon is being pulled towards the Earth by gravity, why doesn’t the moon slam into the Earth?
The moon also pulls on the Earth.
The moons inertia or tangential velocity causes the moon to fall around the Earth.
The Earth’s magnetic field repels it.
The gravitational pulls of the other planets and the Sun keep it from slamming into the Earth.
At 2:30 pm today the moon will slam into the Earth, so get some crackers because we’re eating cheese!!!
If you whirl a tin can on the end of a string and the string suddenly breaks, the can will
fly directly away from you.
fly off, tangent to its circular path.
fly directly toward you.
spiral in toward your hand.
Which statement below is true about Newton's Law of Universal Gravitation? CHOOSE ALL CORRECT ANSWERS.
Every object with mass is attracted to every other object with mass.
The gravitational force is directly proportional to the product of the masses.
The gravitational force is inversely proportional to the square of the distance between two objects.
The gravitational force is inversely proportional to the the distance between two objects.
The gravitational force is inversely proportional to the product of the masses.
At which location shown will the gravitational field strength produced by the star be the greatest?
A
B
C
D
E
What is the gravitational force between two 8-kg objects that are 3-m apart?
4.7 X 10-10-N
5.9 X 10-11-N
7.1-N
1.4 X 10-9-N
A 5-m long rope is being used to spin a 45-kg young child in a circular path. If the rope breaks at 324-N, what is the maximum speed the boy can be spun?
6.0-m/s
9.8-m/s
36.0-m/s
20.0-m/s
A 23-kg car is moving at 2.5-m/s in a circular path with a radius of 1.3-m. What centripetal force must be provided to cause the circular motion?
110.6-N
44.2-N
57.5-N
15.5-N
The table shown gives the mass of five planets and the distance a probe is from the planet. Put these planets in order from the greatest gravitational field strength at the probe to least.
E, B, D, A, C
C, D, A, B, E
D, C, E, B, A
A, B, C, D, E
What happens to the gravitational pull between two objects if they are pulled farther and farther apart?
The pull between them will decrease.
The pull between them will increase.
The pull between them will increase at first and then decrease.
The pull between them will decrease at first and then increase.
An asteroid with a mass of 6.5 X 1015-kg is 89,000-m from a planet that has a mass of 5.7 X 1023-kg. What is the gravitational force between the asteroid and the planet?
3.1 X 1017-N
4.7 X 1029-N
2.8 X 1024-N
4.2 X 1034-N
The picture shows the postion of 5 identical planets around a star. Which planet does the star pull on with the least gravitational force?
A
B
C
D
E
What is it about you that makes you have your very own gravitational field?
You have mass so you have a gravitational field.
You do NOT have a gravitational field because you are much too small.
You are human and therfore are superior to all other forms of life so you must have a gravitational field.
The electrons in you body move producing a gravitational field.
A 5000-kg space probe is orbiting a 7.25 X 1027-kg planet. What is the gravitational force between the probe and the planet if they are 525,000-m apart?
8.77 X 109-N
4.61 X 1015-N
1.32 X 1020-N
6.90 X 1025-N
What is the gravitational field strength at the surface of a planet that has a mass of 6.8 X 1024-kg and a radius of 6,580,000-m?
1.03 X 1018-N/kg
6.89 X 107-N/kg
1.57 X 1011-N/kg
1.05-N/kg
What is the acceleration due to gravity at the surface of a planet that has a mass of 6.8 X 1024-kg and a radius of 6,580,000-m?
1.03 X 1018-m/s2
6.89 X 107-m/s2
1.57 X 1011-m/s2
1.05-m/s2
You need to find the gravitational field strength on the surface of an asteroid. What TWO pieces of information do you need to calculate this?
The mass of the asteroid.
The radius of the asteroid.
Your mass.
The distance the asteroid is from the Sun.
The mass of a planet is 7.5 X 1023-kg and its radius is 3.5 X 106-m. What is the gravitational field strength at a point 350,000-m above the surface of the asteroid?
4.08-N/kg
3.37-N/kg
1.30 X 107-N/kg
1.43 X 107-N/kg
