Font size
WorksheetsUnit 4 Test - Gravitation, Circular Motion and Astronomy
Total questions: 20
Worksheet time: 49mins
The gravitation force involves two masses, and their force is ALWAYS...
Equal magnitude and opposite direction
Equal magnitude and same direction
Different magnitude and opposite direction
Different magnitude and same direction
If the distance "r" double, what happens to the force?
It doubles (multiplied by 2)
It goes down to half (divided by 2)
It goes down to a quarter (divided by 4)
It quadruples (multiplied by 4)
An asteroid with a mass of
4×1021 kg feels a gravitational pull from an adjacent asteroid with a mass of 2×1021 kg. If they are 1000 m away from each other, what is the gravitational force?8.01×1026 N
5.34×1029 N
5.34×1026 N
The greater the period of an orbit, the ____ the velocity.
Greater
Smaller
When the Earth is in motion around the Sun, which of the following vectors are pointed towards the center of the orbit? [More than one to select]
Velocity
Centripetal Force
Acceleration
Centrifugal Force
Mass
A wild and crazy dog runs a circular loop around a cat. If the cat sits in the center with a radius of 3 m, and if the dog is running at 6 m/s, what is the acceleration of the dog's "orbit?"
12 s2m
36s2m
2 s2m
1.5 s2m
A 9 kg tire rotates around the wheel of a car with a radius of 0.19 m. If the tire has a speed of 16 m/s, what is the centripetal force that keeps the tire spinning on the wheel?
6,821.1 N
757.9 N
12,126.3 N
1,347.4 N
Which force is acting as the centripetal force when a car makes a sharp turn around a curve?
Gravitational
Friction
Normal
Applied
When the Moon orbits around the Earth, what prevents the Moon from just flying off into the distance in a straight line?
Newton's First Law/Inertia
Gravitational Force
Velocity
Friction Force
When the Moon orbits around the Earth, what prevents the Moon from stopping its motion and colliding into the Earth?
Newton's First Law/Inertia
Gravitational Force
Velocity
Friction Force
A young boy on a merry go round at the park, feels his body slide towards the outer most edges of the ride as he spins. Why does this happen?
His body wants to maintain its original motion (straight ahead), despite being in an accelerating frame.
The centripetal force points outside the circle
The centrifugal force points towards the center and his body is responding according to Newton's Third Law
Which one of Kepler's Laws states that all planets orbit in an elliptical shape with their star being at one focus?
Kepler's First
Kepler's Second
Kepler's Third
Which one of Kepler's Laws states that a planet's orbit covers equal areas in equal time periods?
Kepler's First
Kepler's Second
Kepler's Third
Which one of Kepler's Laws states that a planet's orbital period is larger as its radius increases?
Kepler's First
Kepler's Second
Kepler's Third
What is the last stage in the life cycle of a small or medium mass star (like our Sun)?
White Dwarf
Black Hole
Neutron Star
Supernova
Planetary Nebula
If a "massive" star is not as massive as it could possibly be, what will be its last stage of life? [HINT: not the category of our Sun]
White Dwarf
Black Hole
Neutron Star
Supernova
Planetary Nebula
A star's life begins once it undergoes nuclear fusion. Nuclear Fusion is responsible for ______?
The gravitational forces that bind the planets to the Sun
The creation of the elements, from hydrogen onwards...
The breaking down and burning up of elements for fuel
The centripetal force that allows the Sun to orbit the center of the Milky Way
Where are the heavier elements (after iron) created?
In the core of a star
In the neutron star
During the supernova
They are made synthetically in a lab
In the core of a white dwarf
What do we call the shift in light from distant galaxies, that indicated that they are accelerating AWAY from each other?
Redshift
Blueshift
Greenshift
Yellowshift
What do we call the radiation that was left over from the Big Bang?
Redshift
Blueshift
Big Freeze
Cosmic Background
Doppler Shift
