Gravitational Force
Attractive
Both
Which is stronger, the strong nuclear force or the weak nuclear force?
The strong nucelar force!
What does Keplers First Law say?
Orbits are in the shape of Ellipses
What is the gravitational force between 2 8000 kg masses which are 100 m away from each other?
4.2688*10^-7 N
What is the value of the universal gravitational constant? Include the correct units.
6.67*10^-11 Nm^2/kg^2
What is the value of Coulombs Constant?
9*10^9Nm^2/C^2
List the four fundamental forces from strongest to weakest
Strong Nucelar Force
Electromagnetic Force
Weak Nucelar Force
Gravitational Force
If the line between the earth covers an area of 1.8*10^36 m^2 in the first three months of the year, approximately how much will it cover in the following 6 months?
3.6*10^36 m^2
What is the eletromagnetic force between a proton and a neutron which are 5.1*10^-15 m apart/
-8.86 N
What is the equation for gravitational force?
F=Gm1m2/d^2
One positive and one negative charge
which forces have the smallest range?
Strong and weak nucelar forces
Explain Keplers 3rd law in your own words, ALSO include an equation.
The square of the period of an orbit is proportional to the cube of its semi major axis. T^2≈a^3
-3.84*10^-13
If the force is originally 800 N, and we double one of the masses what will the new force be?
1600 N
What does a negative force mean when calculating with coulombs law?
Attractive force
What is the strong nucelar force responsible for?
Holding the nucelus together and Fusion Reactions
What is the name of the point where a planet is moving the fastest?
Perihelion
If the mass of the sun is 1.99 *10^30 kg, and Neptune’s orbit has a semi major axis of 9*10^12 m. What is the period of Neptune’s orbit in years.
466.61 Years
If we cut the distance in half between two masses, what factor will the force change by? Will it increase or decrease?
4x increase
If we triple the distance between two charges what factor will the force change by? increase or decrease?
÷9, decrease
Beta Decay
In an elliptical orbit, where is the star located?
At the focus of the ellipse.
If we quadruple the semi major axis of an orbit, what happens to its period?
(Hint: Keplers 3rd law)
x8