Uniform Circular Motion
What is the equation for centripetal acceleration
A 1500 kg car rounds a curve at a centripetal acceleration of 10 m/s. What is the centripetal force?
F = 15000 N
What is the equation for gravitational acceleration of an object?
g = GM/R^2
What did Kepler say about the shape of planets' orbits around the sun?
Elliptical shape, not circular
What is the equation for centripetal force
Fcp = macp OR Fcp = mv^2/r
Find the gravitational force between one dog with a mass of 20 kg and another dog with a mass of 12 kg if they are 5 meters apart from each other.
6.4 x 10^-10 N
What is the equation to find gravitational force between 2 objects
F = G (m1m2)/R^2
What is the equation for period of a planet's orbit around the sun?
T = (2pi/sqrtGMe)(r)^3/2
How does a larger radius affect the centripetal acceleration of an object in circular motion?
larger radius- smaller centripetal acceleration
What is the acceleration due to gravity on the planet Barney? Its mass is 2 x 10^25 kg and its radius is 12 x 10^6 meters
9.3 m/s^2
True or false: When you get far away enough from the sun, there is no gravitational force acting on you. Explain your answer.
False- there is always a gravitational force acting on you but when you move far enough away, the amount of force may be negligible.
What is the equation to find the speed of a satellite orbiting Earth?
v = sqrt(GMe/r)
Which direction is acceleration in circular motion
Inward- towards the center of the circle
Find the orbital period of Uranus. Its distance from the sun is 2.74 x 10^9 km. Mass of the sun is 2 x 10^30 kg.
2 x 10^9 seconds
Calculate the gravitational force acting between 5 kg and 8 kg objects that are 2 m apart.
6.67 x 10^-10 Newtons
Describe Kepler's 2nd Law.
A planet covers the same amount of area in a certain time period no matter where it is on its orbital path
What provides the centripetal force for the moon orbiting around Earth
Gravitational force
Find the speed of a satellite orbiting 2,000,000 meters above Earth's surface
6,903 m/s
If the mass of the sun were to suddenly double without changing the distance to any other planets, what would happen to the gravitational force acting on the earth?
It would double.
What happens to the orbital speed of planets around the sun as they are located further away from the sun?
The further a planet is located from the sun, the slower its orbital speed.