PHYSICS 9 FINAL EXAM REVIEW NAME_________
{FIRST SEMESTER}
****HONORS SUPPLEMENT****
Energy Calculations
Show all work including units. Do LESS! Round all answers to two decimal places.
1) A 2.4 kg can of paint is sitting on top of a 1.4 meter high step ladder. What is the gravitational
potential energy of the can of paint?
2) A 0.25 kg coconut at the top of a tree has a gravitational potential energy 30.38 J.
tree?
How tall is the
3) A 24 kg gazelle runs away from a cheetah going 18 m/s. Calculate the gazelle’s kinetic energy.
4) Suppose a 1.4 kg bunny rabbit wanders down the street with a kinetic energy of 4.375 J. Calculate
the velocity of the bunny rabbit?
.
5) A 0.3 kg coconut at the top of a tree has a gravitational potential energy 21.6J. If the coconut
falls, what is the velocity of the coconut when it is halfway to the ground? (Ignore friction and air
resistance).
6) A 0.2 kg baseball is thrown into the air from ground level with a velocity of 24 m/s. How high will
the baseball be when it reaches its highest point? (Ignore friction and air resistance).
7) A 0.2 kg jumping disc is has 2 J of gravitational potential energy and 1.5 J of elastic potential
energy before it is dropped. What is the velocity of the disc the instant after it bounces on the
ground? (Ignore friction and air resistance).
Uniform Motion Calculations
1. A racecar driver travels at 250 km/hr for 20.0 seconds. How many miles has the driver traveled?
2. Alan leaves Los Angeles at 8:00 AM to drive to San Francisco, 400 miles away. He travels at a steady
55 mi/hr. Beth leaves San Francisco also at 8:00 and drives toward Los Angeles at 80 mi/hr. (Los
Angeles is mile 0, San Francisco is 400)
a) What time will they meet?
b) Where will they meet?
3. Bob leaves home in Chicago at 9:00 AM and travels east at a steady 55 mph. Susan, 400 miles to the
east in Pittsburgh, leaves at the same time and travels west at a steady 65 mph. At what time and
where will they meet?
Accelerated Motion
Clearly draw the graphs.
A soap box derby car rolls down a hill. Show the following for this car: x-t graph, velocity
calculations, v-t table, v-t graph, acceleration, mathematical model for the object
x vs. t table for a soap box derby car
Time(s)
0
2
4
6
8
Position(m)
0
4
12
24
40
Mathmatical Model for the car
x vs t for a soap box derby car
Velocity Work:
v@2s
v@7s
v vs t for a soap box derby car
v vs. t table
Time(s)
0
2
7
v (m/s)
1
Acceleration of the car
FINAL EXAM REVIEW PAGE
NAME______________________________BLOCK____
Hamza is skateboarding down a half-pipe. He wants to know if the height of the half-pipe affects the amount of
kinetic mechanical energy he has at the bottom. He tests half-pipes that are 10m, 6m and 2m tall and measures
his KM energy in kilojoules when he reaches the bottom of each half-pipe.
NOTE- the half-pipes have a standard design and are identical except for the height of the side walls
1. What is the independent variable(IV) in Hamza’s experiment?
2. What are the independent variable groups for Hamza’s experiment?
3. What is the dependent variable(DV)?
4. Write an experimental question for Hamza’s experiment.
5. Write a hypothesis for this experiment in proper format.
6. Write 2 important constants that Hamza must hold to make this a fair experiment.
a.
b.
Hamza collected the following data:
10m6m2m-
90kJ, 87kJ, 88kJ
43kJ, 51kJ, 49kJ
27kJ, 29kJ, 29kJ
7. Construct a data table for Hamza’s experiment using the above data.
8. How many trials were done for this experiment? _______
9. Graph the results of Hamza’s experiment.
10.The coaster is stopped at #1. Draw a pie chart for each part of the ride (1-4) below, assuming there is not any friction.
4
1
2
3
Solve each by doing LESS in 4-point form! L= list E= equation S= substitute S= solve
11.A pronghorn runs at 30 m/s to escape the perusing pack of wolves. Leaving them in the dust, she decides
it is safe and slows down to 10 m/s in 5 seconds. What is the pronghorn’s acceleration?
12. From a standstill, a mountain lion can accelerate at a rate of 4m/s/s. If he accelerates for 2.4 seconds,
what will his final velocity be?
13a. Observe the motion of the cart slowing down after an
initial push without using the motion detector.
x+
b. Is the velocity positive or negative?
c. Is the acceleration positive or negative?
d. Sketch the graphs
e. The x vs.t slope is (positive, negative, zero) and (constant, increasing, decreasing).
The x vs. t slope represents the car’s _______________________.
The v vs.t slope is (positive, negative, zero) and (constant, increasing, decreasing).
The v vs. t slope represents the car’s _______________________
The a vs.t slope is (positive, negative, zero) and (constant, increasing, decreasing).