Speed/Velocity
What is the equation for speed? What is the label?
speed = distance / time
m/s
What is the equation for acceleration? What is the label?
acceleration = (final velocity - initial velocity) / time
m/s2
What is the equation for momentum? What is the label?
momentum = mass x velocity
What is distance?
how much ground an object has covered during its motion
How do you make a distance vs. time graph? What variables go on the x axis and y axis? What does the slope give you?
distance goes on the y axis, time on the x axis
the slope gives you speed
A chicken is crosses the 30 meter road in a time of 9 seconds. What is the chicken's speed?
3.3 m/s
A ball is rolling across the street at 12 m/s. After 5 seconds has passed, the ball is now rolling at 22 m/s. What is the ball's acceleration?
2 m/s2
50.4 kg x m/s
What is displacement?
the distance and direction from your ending position to your origin.
What is inertia?
the tendency of an object to remain constant
What is the difference between speed and velocity?
velocity is speed with direction
Can acceleration be positive and negative? Explain why
positive acceleration indicates speeding up, and negative acceleration indicates slowing down
A football player has a momentum of 680 kg x m/s. The player has a mass of 85 kg. What is the velocity of the football player?
8 m/s
Sue walks 25 meters north before realizing she forgot her pencil. She then walks 10 meters south to grab the pencil. Finally, she walks another 30 meters north to go to her next class. What is Sue's distance traveled?
65 meters
What is mass?
the amount of matter in an object
A runner is traveling at 4.20 m/s. If they travel at this speed for 30 seconds, how far did they travel?
126 meters
A race car begins to accelerate from rest at a rate of 6 m/s2. The car eventually reaches 42 m/s. What is the time frame necessary to reach this speed?
7 seconds
What is the law of conservation of momentum?
Momentum cannot be created or destroyed, it can only be transferred
Sue walks 25 meters north before realizing she forgot her pencil. She then walks 10 meters south to grab the pencil. Finally, she walks another 30 meters north to go to her next class. What is Sue's displacement?
45 meters north
What is a vector quantity?
has magnitude and direction
A truck driver is traveling at 82 km/hr. The driver travels 155 km at this speed. How long did it take the driver to travel this distance?
1.89 hrs
A deer is running in the forest at 18 m/s. After the deer sees a hunter, it slows down at a rate of -1.5 m/s2 over 5 seconds. What is the final velocity of the deer?
10.5 m/s
A 50 kg child is running at 2.5 m/s. What is his initial momentum? If the child jumps onto a 10 kg snow sled, how fast will he go?
125 kg x m/s
sled's velocity: 2.08 m/s
distance: 120 meters
displacement: 87.5 meters
motion as observed from or referred to some material system constituting a frame of reference