1. 3.
4.
5.
6.
Forces and Motion Study Guide
2 hands rubbing together
friction
2. Air Resistance
Air resistance is a type of
As the distance between 2 objects decreases, the gravitational force
between them
Bike tires on the road as you ride
I
friction
A boat on the water as it sails
friction
Centripetal Force is
Force is
The force of gravity between you and Earth in greater that the force of
gravity between you and a car because the Earth has more
than a car.
10. Friction is
11. Gravity is
12., The greater the mass of an object, the
its inertia.
7.
8.
9.
13. Inertia is
14. The Law of Universal Gravitation states that any 2 objects in the universe,
without exception,
each other.
15. A soccer ball rolling on grass is an example of
friction
16. Mass is

Graph the equation by plotting point x=2

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.