The Basics
1D Kinematics
UAM
2D Kinematics
Forces
100
Solve and answer to the correct number of significant figures: 3.76 + ( 4.00 x 10.0 )
43.8
100
Give two example of a vector quantity and two examples of a scalar quantity.
Scalar - time, speed, length, temperature
Vector - Acceleration, Velocity, Force
100
What is UAM? what is changing vs what is staying constant?
Uniform Accelerated Motion
Constant CHANGING velocity
Constant Acceleration
100
Draw a vector diagram of a dog that an 5m west and 7 m north. Put vector on a graph to be able to show the arc. Make sure to include ALL components.
Needs to have: arc, labels, i, f, arrow tip t tail, resultant, etc.
100
When are two instances when an object can have the sum of the forces equal zero?
at rest or when an object is moving with a constant velocity
200
Convert 398mg to kg. Have answer only have 3 significant figures and change to scientific notation
3.98 x 10-4
200
A person walks 4mE, 2mS, 4mW, then 1mN. What is the persons distance vs displacement?
d= 11m
delta X = 1m
200
What does the slop of this graph represent? Is velocity changing or staying constant? Is the object speeding up or slowing down and how do you know?
m=acceleration
velocity is changing
Speeding up because +v and +a
200
A squirrel runs 20.0 meters west and then 4.00 meters south to catch a ball. What is the displacement and direction in which the dog ran? Use correct sig figs and include units
20.4 m and 169 degrees
200
Draw a free body diagram for an object that is moving at a constant velocity of 4m/s to the left. What are the sum of the forces?
FBD on board. sum of forces = zero
300
During a race, a car goes a constant speed of 25m/s during the first 50.0 s. What distance did the car travel? Write answer to correct sig figs and show the 4-step process
D.V., F, P.I., S --> 1250m = 1300M
300
Pete drives his bike in a straight line for 15mins with an average velocity of 12.5km/h. How far has he ridden? Use the 4-step problem solving process and express you answer to the correct number of sig figs.
delta X = 3.1km
300
A car merges onto an interstate with a speed of 6.4m/s and accelerated uniformly for 3.2km in 3.5mins. How fast in m/s is the car moving after this time interval? Use the 4-step problem solving process and Use correct sig figs and include units
+24m/s
300
To avoid an op in the hallway, you walk 5m west, turn north and walk 9m and then finally turn east to travel 2m. Calc the magnitude and direction of the net displacement using correct sig figs and units
Magnitude = 10m
Direction = 108 degrees
300
List newton's three laws in order
1. Inertia, 2. F=ma, 3. Force Pairs
400
In a velocity vs time graph, what will the slope represent? What is the independent and dependent variable?
slope = acceleration
ind=time, dep=velocity
400
A car traveling east at 7.0m/s accelerates uniformly at 2.5m/s2 to reach a speed of 12.0m/s. How long does it take for this acceleration to occur? Use correct sig figs and include units
2.0s
400
A car with an initial speed of 6.5m/s accelerates at a uniform rate of 0.92m/s2 for 3.6s. Calculate the final velocity and the displacement of the car during this time. Assume the positive direction. Use correct sig figs and include units
9.8m/s; 29m
400
A ball rolls off a table with a velocity of 2.0m/s and takes 4.2s to hit the ground. How far from the table does it land? Use correct sig figs and include units
8.4m
400
What is the acceleration of a box that is 20.0kg and has a force of 5.0N pushing from the left and 10.0N from the right? Use correct sig figs and include units
-0.25m/s2
500
A fox is chasing a rabbit. The fox can travel 3m in 2s where the rabbit can travel 2002mm in 0.001hours. In a race, who would win if they both kept a constant speed? Use the four step process to show work
fox = 1.5m/s, rabbit = 0.56m/s, fox would win
500
Analyze the graph (4 analysis) and act out
Answer on White Board Together
500
A brick falls off a 25.0m high ledge at a construction site. How fast will it be moving when it hits the ground and how long will it take to hit the ground? Use correct sig figs and include units
-22.1m/s ; 2.26s
500
A ball rolls off a table with a velocity of 2.0m/s from a height of 1.5m. How far from the table does it land? (Hint: have to think about X and Y) Use correct sig figs and include units
1.1m
500
A seal moves a 125kg block of ice sitting on a frozen lake out of its way. The coefficient of static friction is 0.10. The coefficient of kinetic friction is 0.030. What is the force needed to get the ice in motion vs what is the force needed to keep it in motion? Use correct sig figs and include units
Fsmax=123N
Fk=37N