Terminology
Acceleration is defined as:
Change in speed over a period of time
What is the average velocity of a car that moved 60km in 3 hours?
20km/hr
You are coasting on your skateboard at 1.4 m/s and you decide to speed up. If you accelerate at 0.50 m/s2 for 7.0 s, what is your final speed?
4.9 m/s
Which of the following is not a scalar quantity?
Distance
Mass
Displacement
Time
Displacement
What is Newtons first law of motion?
An object in motion remains in motion unless acted on by an outside force.
Average speed is best defined as:
The total distance covered over the total time covered
How far will a car travel in 25 min at 12 m/s?
18,000 m
A baseball player is stealing second base travelling at 4.0 m/s and accelerating at 2.0 m/s2 for 3.0s. What is the final speed at the end of the 3.0s?
10.0 m/s
A car moved 60 km East and 90 km West. What is its final displacement and distance?
30 Km west or -30 Km East
150 km
Which of Newton's Three Laws does the following statement satisfy? The relationship between an object's mass (m), its acceleration (a), and the applied force F is F=ma.
Newtons second law
Another way to say constant speed is:
Uniform motion
A car traveling at 22.4 m/s skids to a stop in 2.55 s. Determine the skidding distance of the car (assume uniform acceleration).
28.6m
How long does it take to accelerate an object from rest to 15 m/s if the acceleration was 3 m/s2?
5 s
A postal service worker drives to regina (60km east) to pick up his packages. His first delivery is 41 km west, his second delivery is another 14 km west, and his last delivery is 3km east. What is his resultant displacement? Show math or 1/2 points
8 km east
Which of Newton's three laws does the following example illustrate? If you have a hockey puck sliding along a table, it will eventually come to a stop.
First law
When graphing, the independent variable goes on which axis?
X-axis, horizontal
What is the average velocity of a car that moved 40 km East and 80 km West in 2 hours?
60km/hr
You left your house and you arrived at school 30 minutes later. Assuming that your average acceleration was 30 km/h2, and your final velocity was 20km/hr, how fast were you going when you started running?
5 km/hr
Using a vector diagram TO SCALE find the resultant displacement:
Bob drives 15km [N] and 6km [S]
Dr=9km north or -9km s
Which of Newton's Laws does this situation represent? Imagine a ball moving in a straight line directly toward when another ball collides with it. The moving ball exerts a force on the ball at rest. This causes the ball at rest to accelerate. However, the ball at rest also exerts the same magnitude of force (in the opposite direction) of the moving ball.
Newtons third law
How many sig figs are in the following numbers:
0.0700
1004
4.0090
0.00708
3
4
5
3
A person walks 60 meters in 1 minute. Then walks 30 meters in 2 minutes. What is their average speed over the 3 minute walk?
37.5 m/min
If a car has a constant acceleration of 4 m/s2, starting from rest, how fast is it traveling after 5 seconds?
20 m/s
A man drives him tractor 400m [N] and then 700m [E]. What is the resultant vectors angle?
[60 E of N]
Which one of Newtons laws explains why we should where seatbelts while driving?
Newtons first law