Transcript Jeopardy

Physics Jeopardy
Free Body
Diagrams
1st law
2nd law
Mix Up
Mix Up
Q $100
Q $100
Q $100
Q $100
Q $100
Q $200
Q $200
Q $200
Q $200
Q $200
Q $300
Q $300
Q $300
Q $300
Q $300
Q $400
Q $400
Q $400
Q $400
Q $400
Q $500
Q $500
Q $500
Q $500
Q $500
Final Jeopardy
$100 Free Body Diagrams
Draw the net force acting on a box if the box is
traveling at a constant velocity.
$100 Answer Free Body
Diagrams
$200 Free Body Diagrams
What is the net force on a 18 kg cat if it is falling out of
a tree?
$200 Answer Free Body
Diagrams
180 N
(This is a very fat
cat)
$300 Free Body Diagrams
What is the net force acting on a 40 kg box that is
being pulled from the right with a force of 70 N and to
the left with a force of 20 N.
$300 Answer Free Body
Diagrams
400 N
20 N
70 N
Fnet = 50 N right
400 N
$400 Free Body Diagrams
What is the net force on a 10 kg box if it is being
dragged to the left with a force of 30 N and there
is a 12 N frictional force?
$400 Answer Free Body
Diagrams
100 N
30 N
12 N
Fnet = - 18 N
100 N
$500 Free Body Diagrams
What is the acceleration on a 15 kg box that was
sliding on ice at a constant velocity when it hits a patch
of concrete that will provide a frictional force of 40 N?
$500 Answer Free Body
Diagrams
150 N
40 N
Fnet = -40 N
Therefore,
acceleration = -2.67 m/s^2
150 N
$100 Question
st
1
law
Inertia is that property of mater that does
what to a change in motion?
$100 Answer
st
1
law
Opposes a change in motion
$200 Question
st
1
law
The law of inertia states that an object_________.
a) At rest will remain at rest unless acted on by an outside force.
b) Will continue moving at the same velocity unless an outside
force acts on it.
c) Will continue moving in a straight line unless an outside force
acts on it.
d) That is not moving will never move unless a force acts on it.
e) All of the above
f) None of the above
$200 Answer
st
1
law
e) All of the above
$300 Question
st
1
law
When you bring an object with a certain
amount of inertia from Earth to the Moon
(which has less gravity), does it’s inertia
increase or decrease?
$300 Answer
st
1
Stays the same
law
$400 Question
st
1
law
On the surface of Jupiter, the
acceleration due to gravity is about 3
times that of Earth. What would be
the mass of a 120 kg rock on Jupiter?
$400 Answer
M = 120 kg
st
1
law
$500 Question
st
1
law
What is the resultant of a 5.0 N force acting
vertically upward and a 3.0 N force acting
horizontally?
$500 Answer
F = 5.8 N
st
1
law
$100 Question
nd
2
law
A person weighs 500 N. What is the
mass of the person?
$100 Answer
nd
2
m = 50 kg
law
$200 Question
nd
2
law
A rock is thrown vertically into the
air. At the very top of its
trajectory the net force on it is
_________.
a) Less than its weight
b) More than its weight
c) Its weight
$200 Answer
c) Its weight
nd
2
law
$300 Question
nd
2
law
You push with 20 N on a 10 kg
block on a frictionless surface.
How fast will the block
accelerate?
$300 Answer
a = 2 m/s^2
nd
2
law
$400 Question
nd
2
law
Suppose a cart is being moved by a force. If
suddenly a load is dumped into the cart so that
the cart’s mass doubles, what happens to the
cart’s acceleration?
a) It quadruples
b) It doubles
c) It halves
d) It quarters
e) It stays the same
$400 Answer
c) It halves
nd
2
law
$500 Question
nd
2
law
You push with 60 N on a 10 kg
block and there is a 20 N force
of friction. How fast will the
block accelerate?
$500 Answer
nd
2
a) = 4 m/s^s
law
$100 Question Mix Up 1
The mass of a dog that weighs 100 N is about _______.
$100 Answer Mix Up 1
m = 10 kg
$200 Question Mix Up 1
After a cannon ball is fired into frictionless space, the
amount of force needed to keep it going equals
_______.
a) Twice the force with which it was fired.
b) The same amount of force with which it was fired
c) One half the force with which it was fired.
d) On quarter the force with which it was fired.
e) Zero, since no force is necessary to keep it
moving
$200 Answer Mix Up 1
e) Zero, since no force is necessary to keep it moving
$300 Question Mix Up 1
What is the maximum resultant possible when
adding a 3 N force to an 8 N force?
$300 Answer Mix Up 1
maximum resultant is 11 N
$400 Question Mix Up 1
On the moon, the acceleration due to gravity is 1/6 that on
Earth. What would be the weight of a 0.10 kg of salami on
the moon?
$400 Answer Mix Up 1
F = 0.17 N
$500 Question Mix Up 1
A certain unbalanced force gives a 5 kg object an
acceleration of 2 m/s^2. What acceleration would
the same force give a 30 kg object?
$500 Answer Mix Up 1
a = .33 m/s^2
$100 Question Mix Up 2
Accelerations are produced by __________.
a) Velocities
b) Accelerations
c) Forces
d) Masses
e) None of the above
$100 Answer Mix Up 2
c) forces
$200 Question Mix Up 2
Suppose a particle is accelerated through space by a constant
10 N force. Suddenly the particle encounters a second
force of 10 N in a direction opposite to that of the first
force. The particle _________.
a) Is brought to a rapid halt
b) Gradually decelerates to a halt
c) Continues at the speed it had when it encountered the
second force
d) Theoretically accelerates to speeds approaching the speed
of light
e) None of the above
$200 Answer Mix Up 2
c) Continues at the speed it had
when it encountered the second
force.
$300 Question Mix Up 2
How fast will a ball be falling if you throw it
downward at a velocity of 8 m/s and it falls
for 4 seconds?
$300 Answer Mix Up 2
v = -48 m/s
$400 Question Mix Up 2
How long does it take for a rock to fall a distance of
75 meters?
$400 Answer Mix Up 2
t = 3.87 s
$500 Question Mix Up 2
If you apply a forward force to a 1200 kg car of
600 N and there is a frictional force of 70 N,
how fast will the car be going after 5 seconds if
you start pushing it from rest?
$500 Answer Mix Up 2
v = 2.2 m/s
Final Jeopardy
A net force of 1.0 N acts on a 2.0 kg object,
initially at rest, for 2 seconds. What is the
distance the object moves during that time?
Final Jeopardy Answer
1 meter