Download 1st Semester Final Exam Review

1st Semester Final Exam Review
Terms
Define terms & Units
Speed
Velocity
Acceleration
Distance
Displacement
Instantaneous Speed
Average Speed
1) What are 3 ways a car can accelerate?
2) A car starts at rest and uniformly increases speed to a speed of 60 m/s. What is
the car’s acceleration if it has been traveling for 6s?
3) A student tosses a rock in the air with an initial velocity of 30 m/s. Use -10 m/s2
for simplicity.
Time
1 second
2 seconds
3 seconds
4 seconds
5 seconds
6 seconds
Height
Speed
Acceleration
What is the speed and acceleration of the rock at its peak and when the rock returns back
to its initial position?
4) A rock and leaf are dropped at the same time. Describe and Explain what
happens on Earth and in a vacuum.
EARTH
VACUUM
5) a) A bus is traveling 60 mph to Great America. How long will it take to get there
if you have to travel a distance of 100 miles?
b) The trip back to school took 3hrs long. What was the average speed of the bus
on the trip back?
6) A car travels straight down a track. During the 1st second the car goes from
0 m/s to10 m/s and during the 2nd second the car goes from 10m/s to 20 m/s.
What is the car’s acceleration?
7)
A car slows down from 60 m/s to 20 m/s in 2 seconds. What is the car’s
acceleration?
8) A car at rest is accelerating at a rate of 5 m/s2. How long will it take for the car
to reach a speed of 50 m/s?
9)
A car is accelerating at a rate of 5 m/s2. How long will it take a car to reach
60 m/s if the car is initially traveling 20 m/s?
10 ) An object is dropped and hits the ground 5 seconds later.
(Fill in the following values)
6) Write out the formulas that are needed to fill in the following table. Use -10 m/s2
for simplicity.
Time
1 second
2 second
3 second
4 second
5 second
Velocity
Acceleration
Distance
11) A coin is thrown downward at a velocity of 20 m/s and travels for 5 seconds.
7)
(Fill in the following values) Use -10 m/s2 for simplicity.
Time
1 second
2 second
3 second
4 second
5 second
Velocity
Acceleration
12) Define and give 3 examples.
VECTOR
SCALAR
Distance
13)
* Neglect Friction*
Position
Velocity (speeding
up, slowing down,
constant)
Acceleration (positive,
negative, none)
Traveling down
Flat portion
Traveling up
14) State Newton’s 3 laws and give an example of each.
1st Law
2nd Law
3rd Law
15) Is a force needed to keep a puck moving on a frictionless surface? Explain
16) Does a net force cause an object to accelerate? Explain
17) If the mass of an object is doubled how will it affect the following variables?
Inertia
Weight
18) What is the weight of a 1kg object on Earth?
The same object was moved to the moon where there is 1/6 of the gravity. What is the
objects mass and weight on the moon?
19) What is the mass of a 50N object?
20) A 10N force and a 65 N force act in the same direction. What is the net force?
What is the new net force if the 65N force acts in the opposite direction?
21) What is the tension in each string? (provide labels on the diagram)
10 kg
10 kg
10 kg
22) Define friction and provide 2 examples.
23) Draw and Label the forces acting on the box.
24) Which variables are directly proportional? Which are inversely proportional?
F = ma
25) Define terminal velocity
What is the acceleration at terminal velocity?
Draw the forces on a ball that is at terminal velocity
What is the net force on the ball?
26) A 20 kg rock and 1kg rock are falling in a vacuum. What is the weight of each rock?
What is the acceleration due to gravity of each rock? ( F = ma)
Mass
20kg
1kg
Weight
Acceleration due to gravity
27) Define free fall.
What is the net force of an object in free fall? (draw a diagram)
28) What is the net force of an object moving at a constant velocity?
29) A ball is thrown vertically. What is the force(s) acting on the ball at its peak if air is
present?
30) Which situation requires a greater frictional force? What type of friction is acting on
the blocks if they are at rest?
31) A 2kg box has a force of 1N acting on it. How fast will it accelerate?
32) Give the action/reaction pairs on a rocket blasting off in air and a rocket in space.
33) A bullet if fired out of a gun. Describe how the following compare (greater, less or
the same)
BULLET
GUN
Force
Acceleration
Speed
34) ADD GRAPH OF 3 BIKERS 2 CURVED, 1 STRAIGHT….WITH Q’S
a) What type of motion is each biker exhibiting? (Acceleration, Constant velocity)
b) What is occurring when all the lines intersect?
c) Which biker is going the fastest when all the lines intersect? How do you know?
d) Which biker traveled the furthest in their entire trip?
35) How does the horizontal component of a projectiles velocity affect the vertical
component of a projectiles velocity?
Which component accelerates and which moves at a constant velocity?
36) What angle gives you the maximum range?
37) A projectile is fired at 10 m/s at 30 degrees. What other angle will produce the same
range when being fired at 10 m/s?
39) A ball is fired horizontally off a cliff at 100 m/s.
How far with the ball drop vertically in 5s?
How far will the ball travel from the cliff in 5s?