Physics First semester Final Review

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1. 
Area of physics that studies motion and its causes.
 
Mechanics
 
2. 
According to the scientific method, how should conclusions be stated?
 
in a form that can be evaluated by others
 
3. 
SI unit to measure mass
 
gram
 
4. 
Poor precision in scientific measurement may arise from?
 
humman error
 
5. 
A baker making a loaf of bread deals with which area of physics
 
thermodynamics
 
6. 
According to the scientific method, why do physicist make observations and collect data?
 
to ask a question
 
7. 
Delta means
 
difference or change
 
8. 
SI unit for time
 
second
 
9. 
mm represents
 
millimeter
 
10. 
area of physics that studies heat and temperature
 
thermodynamics
 
11. 
listening to your favorite radio station involves which area of physics
 
vibrations and wave phenomena
 
12. 
A hiker uses a compass to navigate through the woods. Identify the area of physics that this involves
 
electromagnetism
 
13. 

According to the scientific method, how does a physicist formulate and objectively test hypotheses?

 
by experiments
 
14. 
The most appropriate SI unit for measuring the length of an automobile is the
 
meter
 
15. 

If some measurements agree closely with each other but differ widely from the actual value, these measurements are

 
precise but not accurate
 
16. 

The Greek letter delta, D, indicates a(n)

 
difference or change
 
17. 
The Greek letter sigma, S, indicates a(n
 
sum
 
18. 

What is the symbol for a time interval?

 
Dt
 
19. 

What is the speed of an object at rest?

 
0.0 m/s
 
20. 

A dolphin swims 1.85 km/h. How far has the dolphin traveled after 0.60 h? (s = d / t)

 
1.1 km
 
21. 

Acceleration is

 
rate of change of velocity
 
22. 

When velocity is positive and acceleration is negative, what happens to the object’s motion?

 
object slows down
 
23. 

A toy car is given an initial velocity of 5.0 m/s and experiences a constant acceleration of 2.0 m/s2. What is the final velocity after 6.0 s?

 
17 m/s
 
24. 

A soccer ball is kicked horizontally. What is its average speed if its displacement is 21.0 m after 4.00 s? (s = d/t)

 
5.25 m/s
 
25. 

Which of the following is a value for the acceleration of objects in free fall?

 
–9.81 m/s2
 
26. 
Acceleration due to gravity is also called
 
free fall acceleration
 
27. 

Objects that are falling toward Earth move

 
faster and faster
 
28. 
Which would hit the ground first if dropped from the same height in a vacuum, a feather or a metal bolt?
 
they would hit the ground at the same time
 
29. 

Which would fall with greater acceleration in a vacuum, a leaf or a stone?

 
they accelerate at the same rate
 
30. 

physphysical quantity that has a magnitude but no direction?

 
scalar
 
31. 

physiphysical quantity that has both magnitude and direction?

 
vector
 
32. 

example of a vector quantity?

 
velocity
 
33. 

Which of the following is the motion of objects moving in two dimensions under the influence of gravity?

 
projectile motion