Circular Motion
What is the direction of the
A) centripetal force
B) centripetal acceleration
C) tangential velocity?
B) towards the center
C) perpendicular to force/acceleration or tangent to the circle
Which single variable affects the gravitation attraction between two objects the most?
distance
What force causes the centripetal acceleration for satellites?
gravity
1 AU is equivalent to how many miles?
93,000,000
What is the number for G?
6.67x10-11
A cyclist is riding around a circular track. The magnitude of the centripetal force is 198 N and the combined mass of the bicycle and rider is 86 kg. What is the centripetal acceleration of the cyclist?
2.3 m/s2
If the distance between two objects triples, the mass of one doubles, and the mass of the other triples, by how many times does the force change? (2x, 3x, 1/2x, 1/3x, etc.)
2/3x
(distance makes it reduce by 1/9, doubling mass doubles force, tripling other mass triples force)
A satellite orbits 7,000,000m from the center of Earth. Earth has a mass of 5.97x1024kg. How fast is the satellite traveling?
7542 m/s
What must your units be for T and a when using Kepler's Third Law equation
years (Earth years to be more precise)
What is Mr. Baughman's favorite color?
Blue
For an object in circular motion, how will the centripetal force change if you double the radius and double the mass and leave all other variables constant?
1/2x
The supermassive blackhole in the middle of the milky way galaxy has a mass of 9.2x1036kg. The sun has a mass of 2.0x1030kg. The distance between then is 2.5x1020m. Determine the force of attraction between these two space objects.
1.96x1016N
What is the orbital speed of a planet orbiting a star a distance of 3x1010m and the mass of the star is 4x1029
29821 m/s
A new asteroid is discovered orbiting the sun! It takes 3.5 Earth years to orbit. What is its orbital distance from the sun in miles.
214,000,000 miles
Which variable represents the "big mass"
m1
A 25 kg kid sits 1.5 m from the center of a merry go round. The merry go round is set in motion and the boy's tangential velocity is 1.5 m/s. What is the centripetal acceleration?
1.5 m/s2
(vt2/r)A new planet is discovered to have a radius of 350km and a mass of 7.5x1020 kg. What is acceleration of gravity on the surface of this planet?
0.41 m/s2 (Yikes! Small gravity planet!)
What is the orbital period of a satellite 5000 km above the surface of the earth. Mass of earth=5.97x1024kg
radius of earth=6371km
12073 s or 201 min or 3.35 hrs
A new planet is discovered to be orbiting the sun every 1000 days. Determine the distance of this planet from the sun in miles.
182,000,000 miles
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a 905 kg car travels around a circular track with a radius of 517 m. If the velocity of the car is 35 m/s, what is the centripetal force?
2144 N
Two people experience a gravitational attraction of 3.0x10-7 N. One of the people have a mass of 75 kg, the other 65 kg. How far apart are they?
0.96 m
The supermassive blackhole in the middle of the milky way galaxy has a mass of 9.2x1036kg. The sun has a mass of 2.0x1030kg. The distance between then is 2.5x1020m. How many earth years does it take to orbit the galaxy once?
3.18x1010 years
The Baughman Comet(pending its discovery) orbits the sun at an average distance of 126,000,000 miles. How long does it take to orbit in days?
576 days
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