Transcript Mid-Term_ReviewGamex

MID-TERM REVIEW
QUESTION #1
The two measurements necessary for calculating
average speed are?
Distance and time
QUESTION #2
What is the acceleration of a car that maintains a
constant velocity of 60miles/hour for 10 seconds?
a = 0 m/s/s
QUESTION #3
You throw a ball upward into the air with an initial velocity
of 30m/s, at what velocity is the ball at it’s upmost
position?
v = 0 m/s
QUESTION #4
A heavy object and a light object are dropped at the
same time from rest in a vacuum. The heavier object
reaches the ground when in comparison to the light
object?
At the same time as the lighter object
QUESTION #5
Which of the following is accelerating?
a.
A ball being juggled
b. A woman walking at a constant speed of 2.5 m/s
along a straight road
c.
A braking cyclist
d.
You riding a Ferris Wheel
QUESTION #6
This graph shows an object that is:
Moving at a constant
speed away from the origin
QUESTION #7
This graph shows an object that is:
Object is not moving
QUESTION #8
If a car is 500 km away from the airport and it has an
average speed of 50 km/hr, how much time will it take
to reach its destination?
d = 500 km
s = 50 km/hr
t=?
t = d/s = 500/50 = 10 hr
QUESTION #9
Sheldon is watching an episode of Mythbusters in his 5th
floor apartment about gravity. He decides to conduct
his own experiment by dropping his science book out
the window. Sheldon uses a stop watch and finds that
the book falls for 1.8s. How far did the book fall?
t = 1.8 s
g = 9.8 m/s/s
h=?
h = ½ gt² = 0.5 x 9.8 x 1.8² = 15.8 m
QUESTION #10
Given the following information, calculate the average time.
Trial
Time
1
2.24 s
2
2.28 s
3
2.31 s
4
2.25 s
5
2.32 s
Average time = 11.4 / 5 = 2.28 s
QUESTION #11
Which of the following objects has the
least amount inertia?
QUESTION #12
Consider a dog sitting in a chair. According to Newton’s
3rd Law, if the chair applies an upward force of 7 N on
the dog, then the dog must be_________.
Applying a downward
force of 7 N on the
chair
QUESTION #13
Determine the net force acting on the following object
and identify the direction the object will travel.
58 – 12 = 46 N left
QUESTION #14
An object that has
must be
In motion
QUESTION #15
In which position(s) does the swinging pendulum in the
diagram have the greatest amount of kinetic energy?
QUESTION #16
As the pendulum bob swings from position 2 to position 3,
its total energy_________.
Remains the same
QUESTION #17
What is the only force that acts on a projectile?
Force of gravity
QUESTION #18
10 seconds after starting from rest a car is moving at 40
m/s. What is the cars acceleration?
Initial velocity = 0 m/s
Final velocity = 40 m/s
t = 10 s
a=?
a = (vf- vi) / t = 40 / 10 = 4 m/s/s
QUESTION #19
What is the speed of a cheetah that sprints 100m in 4 s?
s = d / t = 100 / 4 = 25 m/s
QUESTION #20
1. A person is not wearing a seatbelt flies through a
car window when someone slams on the breaks
because the person wants to remain in straight
motion. Which of Newton’s Laws describes this
situation?
a) Newton’s 1st law
b) Newton’s 2nd Law
c) Newton’s 3rd Law
QUESTION #21
A girl jumps from a boat to the left and the
boat moves to the right. Which of Newton’s
Laws describes this situation?
a) Newton’s 1st law
b) Newton’s 2nd Law
c) Newton’s 3rd Law
QUESTION #22
A 20 kg television is lifted with a force of
100 N. With this force, the TV is
accelerated 5 m/s2. Which of Newton’s
Laws describes this situation?
a) Newton’s 1st law
b) Newton’s 2nd Law
c) Newton’s 3rd Law
QUESTION #23
Which object has the greatest inertia?
Object A
150 kg bike
V=2 m/s
Object B
Object C
1558 kg semi 1500 kg car
v=25 m/s
v= 10m/s
QUESTION #24
What is the KE of a 1500 kg car
moving at a velocity of 29 m/s?
G
U
E
S
S
630750J
QUESTION #25
An object is raised above the ground gaining a
certain amount of potential energy. If the
same object is raised twice as high, it gains
how much more energy?(***Hint*** review
the formula)
PE = mgh
Twice as much energy
QUESTION #26
A rock is thrown upward in the air at a 50 degree
angle with respect to the horizontal. As it
rises, its horizontal velocity will (speed up,
slow down or remain constant)?
remain constant
Question #27
Sphere A is projected off the edge of a 2.0 m high bench with a horizontal
velocity of 4.0 m/s. Sphere B is dropped from the same height as Sphere A.
Both spheres have the same size and mass.
If Sphere A leaves the edge of the table at the same instant Sphere
B is dropped, Sphere A will land….
a) At a time before B
b) At a time after B
c) At the same time as B