Download Semester 1 Final Exam Review

Physics
Semester 1 Exam Review
You may use your NOTES on your final exam. I recommend using your notes while you complete this
review, and add things to your notes that may be missing. You may not use this review itself on the final
exam, or other assignments, only what’s in your notes. The problems are pretty much in the order we
covered them. Show your work on separate paper!
1.
Convert 23 meters to micrometers.
2.
Convert 78 milliseconds to seconds.
3.
Give an example of a vector and a scalar. What makes one a vector and the other a scalar?
4.
What is the only difference between speed and velocity?
5.
A jet flies 350 km/hr North. The wind is blowing towards the West at 32 km/hr. Find the jet’s
resultant displacement (magnitude, unit, direction, and angle if appropriate).
6.
A canoe paddles South in a river at 4 miles per hour. The current is headed North at 1.5 miles per
hour. What is the resultant velocity vector for the canoe?
7.
What is the difference between mass and weight? How do you convert one to the other (in both
metric and customary)? Know their units and which one is a force.
8.
A person that weights 780N has a mass of what?
9.
If you live 8 miles from Airport High School, and it takes your bus 0.25 hours to get there from your
place, what is the speed of the bus?
10.
Superman runs along a level road and increases his speed from 2 m/s to 35 m/s in 4 seconds. What
is his acceleration?
11.
Barky the dog starts to chase a Frisbee and accelerates at 0.8 m/s2. He starts at rest, and runs for 3
seconds before catching it. How far did he run to catch the Frisbee?
12.
A window birdfeeder falls from a window that is 14 m above the ground. How fast is the feeder
moving at the instant just before it hits the ground?
13.
Know about the physics number, “g”, what it is in metric and customary, and what it stands for.
14.
In projectile problems, are the horizontal and vertical components independent of each other?
15.
An air rocket is launched at an angle of 35 degrees with an initial velocity of 29 m/s. Find the
vertical and horizontal components of the velocity.
16.
Which would have a lower coefficient of friction, sliding across gravel or slinging across Teflon?
17.
You are driving at 55 miles per hour and stop suddenly in your car. Which of Newton’s laws
primarily describes why your body is thrown forward?
18.
At the same time that Annie fires a bullet horizontally from her rifle, another bullet is simply
dropped from the same height. What happens if there is no air resistance?
19.
What force is needed to give a mass of 80 kg an acceleration of 124 m/s2?
20.
Charlie’s 15,500 N car is parked on an incline that makes an angle of 20 degrees with the
horizontal. If the maximum force the brakes can withstand is 6000 N, will the car remain at rest or
will it roll down the incline? Explain your answer in terms of the specific normal and/or specific
parallel forces in this problem.
21.
My cat must apply a horizontal force of 1.5 N to move her toy mouse, which has a mass of 0.12 kg,
across the floor at constant speed. Find the coefficient of sliding friction between the mouse and
the floor.
22.
Claire applies a horizontal force of 55 N to move a 20 kg pile of coconuts across the table. If the
coconuts have an acceleration of 4 m/s2, find the coefficient of friction between desks and
coconuts.
23.
On an inclined plane problem, which force is responsible for the object sliding down the incline,
and which force is responsible for the object pushing against the plane itself?
24.
A 0.5 kg football is thrown with a velocity of 15 m/s. A stationary receiver catches the ball and
brings it to rest in 0.03 s. What is the force exerted on the receiver?
25.
A car is traveling at 5 m/s If the mass of the car is 8000 kg, what is the car’s kinetic energy?
26.
How much work is done by a 58 N force acting over a distance of 14 m?
27.
How much work can a 400 watt motor do in 5 seconds?
28.
How much horsepower does a 60 watt light bulb have?
29.
You stand holding a tennis ball 4 feet above the ground and are prepared to drop it. The ball has
what type of energy?
30.
Ben, who has a mass of 73 kg, climbs a 14 m tree. How much gravitational potential energy does he
have?
31.
The staples inside a stapler are kept in place by a spring with a relaxed length of 0.1 m. If the spring
constant is 51 N/m, how much elastic potential energy is stored in the spring when its length is
0.05 m?
32.
What does the Law of Conservation of Momentum state? How about the Law of Conservation of
Energy?
33.
If an object is not moving, what is its momentum?
34.
A large mutant squirrel with a mass of 341 kg is running with a velocity of 30 m/s. Find its
momentum.
35.
A 3100 kg car is slowed down uniformly from an initial velocity of 19 m/s by a 1220 N braking force
acting opposite the car’s motion. What is the car’s velocity after 1.2 seconds?
36.
AstroMan is out on a spacewalk in deep space. AstroMan has a mass of 72 kg and is holding a 9 kg
basketball. Why does AstroMan have a basketball? I don’t know. He throws the ball into deep
space at 3 m/s in order for him to move in the opposite direction. How fast does AstroMan move
once he throws the ball? What will happen to the basketball according to Newton’s 1st Law?
37.
A car has a momentum of 32, 154 kgm/s. If it is traveling at 28 m/s, what is the mass of the car?