Transcript ASCOS #8.1

3rd Quarter CRT Review - 2
8.0
8.1
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9.1
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ASCOS #8.0 – 5 points
Question
What factor explains the tendency
of all objects to resist any change
in motion?
ASCOS #8.0– 10 points
Question
What type of activity best
demonstrates Newton’s third law of
motion?
ASCOS #8.0– 15 points
Question
When the brakes are suddenly
applied to a moving vehicle, what
causes a person to continue to
move forward in his seat?
ASCOS #8.0– 20 points
Question
Which of Newton’s laws explain
inertia?
ASCOS #8.0– 25 points
Question
Which of Newton’s Laws states that
for every action there is an equal
and opposite reaction?
ASCOS #8.1– 5 points
Question
If an astronaut throws a ball in
space, when will the ball stop?
ASCOS #8.1– 10 points
Question
When the driver of a car suddenly
makes a sharp turn, why will the
passenger slide to the side of the
car?
ASCOS #8.1– 15 points
Question
Use Newton’s second law of motion
(F=ma) to calculate the
acceleration of a 12 kg mass if a
force of 45 N acts on it.
ASCOS #8.1– 20 points
Question
Use Newton’s second law of motion
(F=ma) to calculate the mass of an
object when a force of 28 N
accelerates the object 3 m/s/s.
ASCOS #8.1– 25 points
Question
Given the formula, (acceleration = final
velocity – starting velocity divided by time),
what is the acceleration of the wind if it
blows with a velocity of 15 m/s south and
five seconds later, the wind’s velocity is 20
m/s south?
ASCOS #9.0– 5 points
Question
What type of simple machine is a
jar lid?
ASCOS #9.0– 10 points
Question
Two bicycles ramps have the same
height. The first ramp is twice as
long as the second ramp. Why
does the first ramp have a better
mechanical advantage?
ASCOS #9.0– 15 points
Question
What type of simple machine is an
inclined plane with one or two
slanting sides?
ASCOS #9.0– 20 points
Question
When a machine increases the size
of the force exerted, what happens
to the distance through which the
force is exerted?
ASCOS #9.0– 25 points
Question
To open a bottle, Mary applies a
force of 90 N to the bottle opener.
The bottle opener applies a force of
225 N to the bottle cap. What is the
mechanical advantage of the bottle
opener?
ASCOS #9.1– 5 points
Question
A syringe with air is stoppered. It is
then pushed in. What can be said
of the original air pressure as
compared to the final air pressure?
ASCOS #9.1– 10 points
Question
What is the density of a 50 cm3
sample of liquid with a mass of
300 g? (D=m/v)
ASCOS #9.1– 15 points
Question
What is the pressure exerted on
the floor by a 5,000 N crate with an
2
area of 10 m ? (Pa=F/a)
ASCOS #9.1– 20 points
Question
What is the SI unit for pressure?
ASCOS #9.1– 25 points
Question
What is the weight of a rock with an
area of 10m2 that exerts a pressure
of 250 Pa in correct SI units?
(Pa=F/a)
ASCOS #10.0– 5 points
Question
What is the SI unit for energy?
ASCOS #9.1– 10 points
Question
What volume of fluid does an
object displace?
ASCOS #9.1– 15 points
Question
What would happen if astronauts, who
wear pressurized suits in space, took
their suits off to go outside of the
spaceship?
ASCOS #9.1– 20 points
Question
Why do hydraulic devices use
liquids instead of gases?
ASCOS #9.1– 25 points
Question
Why do you not notice atmospheric
pressure on your body?
ASCOS #8.1– 5 points
Question
What causes the napkins to stay on
the picnic table even though there
is a slight breeze?
ASCOS #8.1– 10 points
Question
What factors cause a change in
acceleration?
ASCOS #8.1– 15 points
Question
What is needed to calculate an
object’s acceleration?
ASCOS #8.1– 20 points
Question
What is the force that opposes
motion between two surfaces that
are touching?
ASCOS #8.1– 25 points
Question
What type of friction is also known as air
resistance?
ASCOS #8.0
Topic
Identify Newton’s Three Laws of
Motion.
ASCOS #8.1
Topic
Identify and calculate the elements
of motion.
ASCOS #9.0
Topic
Describe how mechanical
advantages of simple machines
reduce the amount of force needed
for work.
ASCOS #9.1
Topic
Describe the effect of force on
pressure in fluids.
ASCOS # ?
Topic
Differentiate between kinetic and
potential energy. & Describe the
affect of force on pressure in a
fluid.
ASCOS # ??
Topic
Hodge Podge – a mixture of
questions from all objectives.
ASCOS # 8.0
Answer
inertia
ASCOS # 8.0
Answer
A rocket maneuvering in space, a
balloon flying around the room, you
sitting in a chair, a rocket
launching at Cape Canaveral
ASCOS # 8.0
Answer
inertia
ASCOS # 8.0
Answer
first law of motion
ASCOS # 8.0
Answer
Newton’s third law
ASCOS # 8.1
Answer
The ball will remain in motion
forever or until it hits another
object.
ASCOS # 8.1
Answer
inertia
ASCOS # 8.1
Answer
3.75 m/s/s [F=ma; therfore a=F/m =
45N/12kg = 3.75 m/s/s
ASCOS # 8.1
Answer
9.3 kg [F=ma; therefore m=F/a =
28N/3m/s/s = 9.3 kg]
ASCOS # 8.1
Answer
1 m/s/s south [Vf – Vs /t = 20m/s –
15m/s ÷ 5s = 5 m/s ÷ 5s = 1 m/s/s.]
ASCOS # 9.0
Answer
screw
ASCOS # 9.0
Answer
The ramp is longer so less force is
required to ride up.
ASCOS # 9.0
Answer
wedge
ASCOS # 9.0
Answer
Distance must decrease
ASCOS # 9.0
Answer
2.5 [Mechanical Advantage =
Output force/Input force = 225 N/
90N = 2.5]
ASCOS # 9.1
Answer
The original is less than the final.
ASCOS # 9.1
Answer
6 g/cm3 [D=m/v = 300g/50cm3 =
6 g/cm3]
ASCOS # 9.1
Answer
500 Pa [Pa = F/a = 5,000N/10m2 =
500 Pa]
ASCOS # 9.1
Answer
Pa (Pascal)
ASCOS # 9.1
Answer
2,500 N [Pa = F/a; therefore F=Pa x a
= 250 Pa x 10 m2 = 2,500 N]
ASCOS # 10.0
Answer
joule
ASCOS # 9.1
Answer
A volume equal to its own volume
ASCOS # 9.1
Answer
The fluids in their bodies would
overcome the pressure outside of
their bodies, and they would
explode.
ASCOS # 9.1
Answer
Gases can be compressed and
liquids cannot
ASCOS # 9.1
Answer
Because the fluids inside your
body also exert pressure outward
ASCOS # 8.1
Answer
Static friction
ASCOS # 8.1
Answer
A change in direction or velocity
ASCOS # 8.1
Answer
Starting velocity, final velocity, and
the total time it takes to change
velocity
ASCOS # 8.1
Answer
friction
ASCOS # 8.1
Answer
Fluid friction