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WorksheetsGRAVITY
Total questions: 14
Worksheet time: 7mins
The force attraction between two objects of masses “M“ and “m” which lie at a distance “d” from each other is directly proportional to the _____.
sum of the masses of objects M+m
product of the masses of objects M×m
difference between masses of objects M-m
sum of the squares of masses of objects M2+m2
Which of the phenomenon mentioned in the options is NOT explained by the universal law of gravitaton?
The motion of the moon around the earth.
The tides are due to the moon and the sun.
The force that binds us to the earth.
The motion of sun around the planets.
Every particle in the universe attracts every other particle with a force that is proportional to ______ and inversely proportional to ______ between them.
the sum of their masses; the square of the distance
the square of the distance; the product of their masses
the product of their masses; the distance
the product of their masses; the square of the distance
Which of the following statements bout gravitational force is NOT correct?
It is experienced by all bodies in the universe.
It is a dominant force between celestial bodies
It is a negligible force for atoms.
It is the same for all pairs of bodies in our universe.
The Copernicus’s model does NOT solve which of the following?
The different brightness of the planets is due to the fact that they are different distances from Earth.
The retrograde motion could be explained in terms of geometry and a faster motion for planets with smaller orbits.
The stars to appear to revolve around the Earth once in 24h.
It can explain all the details of planetary motion on the celestial sphere without epicycles.
What is NOT correct in the Copernicus’s model?
Earth/planets orbit the Sun in circular orbits.
The Moon is in orbit around the Earth.
The stars orbit the Sun.
The Earth rotate once in 24 hours
How does the gravitational attraction between two point masses change if the distance is doubled and the mass of each object is halved?
4 times more
16 times more
4 times less
16 times less
How many times does the gravitational attraction between two point masses increase if the distance is 4 times increased and the mass of one object is tripled?
3/16 times
3/4 times
4 times
3 times
How many times does the gravitational attraction between two point masses increase if the distance is 2 times increased and the mass of one object is tripled?
3/16 times
3/4 times
3/2 times
3 times
Compared to the Earth, Planet X has twice the mass and twice the radius. This means that compared to the Earth’s surface gravity, the surface gravity on Planet X is
4 times as much.
twice as much.
the same.
1/2 as much.
Compared to the Earth, Planet X has twice the mass and twice the radius. This means that compared to the amount of energy required to move an object from the Earth’s surface to infinity, the amount of energy required to move that same object from Planet X’s surface to infinity is
4 times as much.
twice as much.
the same.
1/2 as much.
A satellite is moving around the Earth in a circular orbit. Over the course of an orbit, the Earth’s gravitational force _____
does positive work on the satellite.
does negative work on the satellite.
does positive work on the satellite during part of the orbit and negative work on the satellite during the other part.
does zero work on the satellite at all points in the orbit.
A planet (P) is moving around the Sun (S) in an elliptical orbit. As the planet moves from aphelion to perihelion, the Sun’s gravitational force
does positive work on the planet.
does negative work on the planet.
does positive work on the planet during part of the motion and negative work during the other part.
does zero work on the planet at all points between aphelion and perihelion.
A planet (P) is moving around the Sun (S) in an elliptical orbit. As the planet moves from aphelion to perihelion, the planet’s angular momentum ________.
increases during part of the motion and decreases during the rest of the motion.
increases at all times.
decreases at all times.
remains the same at all times.
