Study Guide Answer Key
1. Instantaneous speed – speed at any given time
(cop radar)
Constant speed – speed stays the same the entire
time (car on cruise control)
average speed – total distance traveled in a given
time (the average speed you went on a car trip)
2. Distance relates to gravity because the farther
objects are apart, the less gravity.
Mass relates to gravity because the more mass
objects have, the stronger the gravitational pull
3. Mass – how much matter or particles are in an
object
Volume – how much space an object or substance
takes up
Weight – force of gravity on an object
4. Contact: Applied, Normal, Friction, Tension, Spring
Non-Contact: Gravitational, Magnetic, Electrical
5. Every particle and object in Universe has gravity
and amount gravity depends on mass and
distance.
6. Electrical force (static electricity – charges mix
together)
7. Speed, direction or both
Speeding up, slowing down or changing direction
9. distance/time = 44 km/11 s = 4 km/s
10. speed is 48 km/h time is 3.5 h
d = st = 48 x 3.5 = 168 km
distance =?
11. S = d/t d=st
t=d/s
12. a = vf – vi
t
13. speed = how much distance traveled in an
amount of time
velocity = the same plus in a given direction
14. at rest – speed is constant at zero
15.Independent = always time (on x-axis)
dependent = always distance (on y-axis)
16.Straight line represents constant speed (only on
a speed graph)
17. SI unit for speed is m/s. Acceleration is m/s2
18. Air resistance slows it down or pushes in all
directions, including up, gravity pulls it down
19.The same time if they are the same size.
20. The amount of inertia depends on the amount
of mass and object has.
21. The amount of gravity depends on mass and
distance.
22. Your weight will decrease as you go higher,
because you are increasing your distance from
Earth.
23.For every action, there is an equal and opposite
reaction.
24. friction is always in opposite direction of
motion
25. A force is always described by its:
strength and direction
26. a) 2nd Law
c) 3rd Law
b) Universal Gravitation
d) 1st Law
27. B (FCAT Question)
28.independent variable (what you change on purpose)
= amount of food
dependent (outcome/measure) = weight
control (keep normal to compare) = normal amount of
food
constant (keep same) = type of tank, type of fish, type
of food, etc.
29.
30 N
Piano
50 N
Net Force = 80 N