How many significant figures are in the following numbers:
A.) 123.05
B.) 0.234
A.) 5
B.) 3
100
What does the prefix kilo mean?
thousand
100
How many inches are in a mile? (5280 ft = 1mile)
63360 inches
100
What is slope on a position vs time graph?
Velocity
100
An person starts at a position of 10m, walks to a position of 5m and then walks to a position of 7m.
-What is the person's displacement?
-What is the total distance they traveled?
Displacement = -3m
Distance = 17m
200
How do you write the following number in scientific notation?
0.000045
4.5 x 10^-5
200
How do you write the SI prefix mili- as a power of 10?
10^-3
200
How many seconds are in a year?
3.16 x 10^7 seconds
200
What is slope on a velocity vs time graph?
acceleration
200
A car travels at its top speed for 10 seconds. During those ten seconds the car moves from a position of 100m to a position of 0m.
-What is the car's top speed?
- What is the car's velocity during this time?
- What is the car's acceleration during this time?
speed= 10m/s
velocity = -10m/s
Acceleration= 0 (no change in velocity)
300
Do the following problems using the correct number of significant figures
12.3 + 23.89 = ?
(12.0) x (4.000)= ?
12.3 + 23.89 = 36.2
(12.0) x (4.000)= 48.0
300
If my ruler has centimeter markings as its smallest unit of graduation, what is the uncertainty I can report my answer to?
to the tenth of a cm,
for example 1.2cm
300
Convert 15 m/s to miles per hour. (There are 0.000621 miles to a meter)
33.55 MPH
300
Draw a velocity vs time graph of an object being thrown up in the air with an initial velocity of 12m/s, and returning back to the same position. You must label the initial velocity on your graph, as well as the acceleration.
Up to judge
300
A ball is thrown downward off a cliff with an initial velocity of 5m/s. If it takes the rock 6 seconds to hit the ground, what is the velocity of the rock just before it hits the ground?
65 m/s
400
Do the following problems:
(2.0 x 10^6) x (6.0 x 10^-2) = ?
(8.0 x 10^3) / (4.0 x 10^4) = ?
(2.0 x 10^6) x (6.0 x 10^-2) = 12 x 10^4 or 1.2 x 10^5
(8.0 x 10^3) / (4.0 x 10^4) = 2.0 x 10^-1
400
If my smallest graduation marking is a kilometer, what is an acceptable uncertainty for a measurement?
Convert 65 trees per acre to number of pages per square foot.
(1 tree is about 25 books)
(1 book is about 150 pages)
(1 square foot is 2.3 x 10^-5 acres)
5.6 pages per square foot.
400
Draw a velocity vs time graph of a person traveling with a velocity of 3m/s for 3 seconds, and then experiencing an acceleration of -1m/s^2 until they are traveling in the opposite direction with a speed of 2 m/s^2.
Up to judge
400
A rock is dropped off a cliff that is 45m tall. If it takes 3 sec for the rock to hit the ground what is the velocity it reaches just before it hits the ground?
30 m/s
500
What is the number of significant figures in the following numbers:
0.00450 1.02050 1000 12in/ 1 foot
3, 6, 1, infinite
500
How many kilometers are in a milimeter?
1 x 10^-6
500
An object starts with a velocity of 4 m/s and an acceleration of -1m/s^2. Draw a velocity vs time graph of the objects motion for 10 seconds. Describe the motion of the object.
The object slows down for 4 seconds, briefly comes to a stop and the speeds up in the opposite direction for 6 seconds.
500
A rocket launches with an acceleration of 15m/s^2. After 10 seconds, the rocket runs out of fuel and the engine shuts down. how much time does it take for the rocket to reach its maximum height?