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by BlastRoom
Practice universal gravitation, orbital motion, and attraction or repulsion in field forces.
#physics
20 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
Two spherical boulders of mass 900 kg and 2.0 × 10⁴ kg have centers 3.0 m apart. Use G = 6.67 × 10⁻¹¹ N·m²/kg². What is the gravitational force between them?
A 1500 kg satellite is 8.0 × 10⁶ m from the center of a planet of mass 6.0 × 10²⁴ kg. Use G = 6.67 × 10⁻¹¹ N·m²/kg². What gravitational force acts on it?
Two 5.0 kg lab masses have centers 0.20 m apart. Use G = 6.67 × 10⁻¹¹ N·m²/kg². What is the gravitational force between them?
A satellite moves in a circular orbit 7.0 × 10⁶ m from Earth's center. Use G = 6.67 × 10⁻¹¹ N·m²/kg² and × 10²⁴ kg. What orbital speed is required?
A probe orbits an asteroid of mass 4.0 × 10²² kg at radius 2.0 × 10⁶ m. Use G = 6.67 × 10⁻¹¹ N·m²/kg². What is its circular orbital speed?
A moon orbits a planet of mass 8.0 × 10²⁵ kg at radius 4.0 × 10⁸ m. Use G = 6.67 × 10⁻¹¹ N·m²/kg². What circular orbital speed does gravity require?
Two masses attract with force F. If the same masses are moved so their center-to-center distance is tripled, what is the new gravitational force?
Two objects attract with force F. One mass is doubled, the other mass is unchanged, and the separation is cut in half. What is the new gravitational force?
Two small asteroids attract with force F. If each mass were half as large and their separation were twice as large, what would the gravitational force be?
A satellite at orbital radius r feels a gravitational force F from a planet. A second satellite with twice the mass orbits the same planet at radius 2r. What gravitational force acts on the second satellite?
In the diagram, B is twice as far from planet P's center as A. A 5 kg probe is moved from A to B. How does the gravitational force change?
The field-line diagram marks C and D on one radial line; D is half as far from the planet's center as C. How does the force on the same probe at D compare with at C?
In the field-line diagram, E and F are the same distance from planet P but on opposite sides. How do the gravitational forces on identical probes compare?
At point S, the diagram shows a satellite's velocity V and force F. Which interpretation fits a circular orbit?
The diagram represents gravity between bodies A and B, with B much more massive. Is the force pair drawn correctly?
At point S in the orbit, the arrow labeled F points away from the center. What should be changed for the force on an orbiting body?
A student says Earth pulls on a falling rock, but the rock does not pull on Earth. Which response is best?
Astronauts float inside an orbiting station. Which explanation is most accurate?
Which field forces can be repulsive between two objects of the appropriate kind?
Two small metal spheres both carry a noticeable negative charge and sit 10 cm apart. Both gravity and the electric force act between them. What happens overall?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.
Pick a tile, answer, hit bonuses and steals.
Kinetic Energy
40 questions
