Transcript Jeopardy Motion Newtons Review

Motion/Newtons Physics
Review
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VELOCITY AND
SPEED
Acceleration
Vectors
Momentum And
Impulse
rd
3
Newton’s
Law and
Friction
Velocity and
Acceleration
Speed
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Vectors
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Momentum Newton’s 3rd
and Impulse and Friction
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CATEGORY 1 - $100
An object moves a distance of
10 m in 5 seconds. The average
speed of the object is
a 0.5 m/s
b 2.0 m/s
c 40 m/s
d 50 m/s
CATEGORY 1 - $200
A baseball Pitcher throws a
fastball at 42 m/s. If the batter is
18 meters from the pitcher,
approximately how much time
does it take for the ball to reach
the batter?
a 1.9 s
b 2.3 s
c 0.86 s d 0.43 s
CATEGORY 1 - $300
As a cart travels around a
horizontal circular track, the cart
MUST undergo a change in
a: velocity
b: speed
c: inertia
d: weight
CATEGORY 1 - $400
What is the
distance
covered
between the
nd
th
2 and 6
second?
a 8m b 2m
c 6 m d 4m
CATEGORY 1 - $500
The average speed of a plane was
600 kilometers per hour. How long
did it take the plane to travel 120
km?
a: 0.2 h
b: 0.5 h
c: 0.7 h
d: 5 h
CATEGORY 2 - $100
As an object falls freely near the
surface of the Earth, its velocity:
a: decreases b: increases
c : remains the same
CATEGORY 2 - $200
2
m/s
A car starts from rest at 4.0
. The car will reach a speed of
28 m/s at the end of:
a: 3.5 s
b: 7.0 s
c: 14 s
d: 24 s
Acceleration - $300
A toy projectile is fired from the ground
vertically upward with an initial velocity of +29
meters per second. The projectile arrives at its
maximum altitude in 3.0 seconds. As the
projectile rises and then falls back to the ground,
its acceleration
a: decreases, then increases
b: increases, then decreases
c: increase only
d: remains the Same
Acceleration - $400
A car moving at a speed of 8.0 meters per
second enters a highway and accelerates at
3.0 meters per second2. How fast will the
car be moving after it has accelerated for
56 meters?
a: 24 m/s
c: 18 m/s
b: 20 m/s
d: 4 m/s
Acceleration - $500
An object, initially at rest, falls freely near
the Earth's surface. How long does it take
the object to attain a speed of 98 meters per
second?
a: .1 s
c: 98 s
b: 10 s
d: 980 s
Vectors - $100
Which is a scalar quantity?
a: displacement
b: velocity
c: acceleration
d: mass
Vectors - $200
The resultant of two concurrent forces is
minimum when the angle between them is:
a: 0
b: 90
c: 180
d: 270
Vectors - $300
Two concurrent forces of 40 newtons and X
newtons have a resultant of 100 newtons.
Force X could be
a: 20
b: 40
c: 80
d: 150
Vectors - $400
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a: .5 W
b: .87 W
c: 1.0 W
d: 1.5 W
In the diagram , the
weight of a box on a
plane inclined at 30.º
is represented by the
vector W. What is
the magnitude of the
component of the
weight (W) that acts
parallel to the
incline?
Vectors - $500
The handle of a lawn roller is held at 45º
from the horizontal. A force, F, of 28.0
newtons is applied to the handle as the
roller is pushed across a level lawn, as
shown in the diagram below. What is the
magnitude of the force moving the roller
forward?
a: 7.0 N b: 14.0 N
F
450
c: 19.8 N d: 39.0 N
Momentum and Impulse - $100
What is the momentum of a 30-kilogram
cart moving with a speed of 10 meters per
second?
a: 20 kg-m/s
c: 3 kg-m/s
b: 40 kg-m/s
d: 300 kg-m/s
Momentum and Impulse - $200
What is the momentum of a 1.5
3
x 10 kg car as it travels at 30
m/s due east for 60s?
a: 4.5 x 10 4 kg-m/s, east
b: 4.5 x 10 4 kg-m/s, west
c: 4.5 x 10 6 kg-m/s, east
d: 4.5 x 10 6 kg-m/s, west
Momentum and Impulse - $300
A mass with a momentum of 40.
kg-m/s receives an impulse of
30N*s in the direction of its
motion. The final momentum of
the mass is
a:1.3 kg-m/s
c: 70 kg-m/s
b:10. kg-m/s
d:150 kg-m/s
Momentum and Impulse - $400
A 4.0-kilogram mass is moving at 3.0
meters per second toward the right and a
6.0-kilogram mass is moving at 2.0 meters
per second toward the left on a horizontal
frictionless table. If the two masses collide
and remain together after the collision, their
final momentum is
a:12 kg-m/s
c: 4 kg-m/s
b: 7 kg-m/s
d: 0 kg-m/s
Momentum and Impulse - $500
If the 1.0-kilogram object
receives an impulse of +20.0
newton-seconds, what impulse
does the 2.0-kilogram object
receive?
a: 0 N*s
b: - 10 N*s
c: - 20 N*sd: - 40 N*s
Gravitational and Newton’s 3rd - $100
A 30-kilogram boy exerts a force of
100 newtons on a 50-kilogram object.
The force that the object exerts on the
boy is
a: 500 N b: 30 N
c: 100 N d: 0 N
Newton’s 3rd and Friction - $200
A 1-kilogram object rests on a
horizontal table top. The force that the
table top exerts on the object is
a: 1N
c: .1N
b: 1 kg
d: 9.8 N
Newton 3rd and Friction - $300
In order to keep an object weighing 20
newtons moving at constant speed
along a horizontal surface, a force of
10 newtons is required. The force of
friction between the surface and the
object is
a: 10 N
b: 30 N
c: 20 N
d: 0 N
Newton’s 3rd and Friction - $400
The diagram below which represents a
3.0-kilogram mass being moved at a
constant speed by a force of 6.0
newtons.The magnitude of the force of
friction acting on the mass is
a: 3 N
c: 0 N
b: 6 N
d: 18 N
Newton’s 3rd and Friction - $500
The diagram below which represents a 3.0kilogram mass being moved at a constant
speed by a force of 6.0If the surface were
frictionless, the 6.0-newton force would
produce an acceleration of
a: .33 m/s2
b: 2 m/s2
c: 6 m/s2
d: 33 m/s2
Velocity and Speed - $100
b 2.0 m/s
V= d/t =10m / 5s = 2.0 m/s
Velocity and Speed - $200
d 0.43s
v=d/t
42 m/s = 18 m / t
t =18 m / 42 m/s
t = 0.43 s
Velocity and Speed - $300
a: Velocity
Velocity has direction in its
measurement, circle motion
must have a constant change in
direction
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Velocity and Speed - $400
d: 4m
6m-2m = 4m
Velocity and Speed - $500
a : 0.2 h
v=d/t
600 km /h = 120 km / t
t = 120 km / 600 km / h
t=.2h
Acceleration - $100
b: increases
The velocity increases at 9.81
m/s every second!
Acceleration - $200
b: 7.0 s
a=v/t
2
4.0 m/s = 28 m/s – 0 m/s / t
t = 28 m/s / 4.0 m/s2
Acceleration - $300
d: remains the same
All objects fall at a constant
acceleration of 9.81 m/s2
unless friction is present
Acceleration - $400
b: 20 m/s
Vf2 = Vi2 + 2ad
= ( 8m/s )2 + 2 ( 3m/s2 ) ( 56m)
= 400 m2/s2
Vf = 20 m/s
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Acceleration - $500
b: 10 s
Vf = Vi+ at
98 m/s = 0 m/s + 9.8 m/s2 t
98 m/s = t
9.8 m/s2
10 s
=t
Vectors - $100
d: mass
Mass has no direction!
Vectors - $200
c: 180
0
The minimum vector
addition direction results
from opposite direction
Vectors - $300
c: 80 N
Adding 80N + 40N =120N
Subtracting 80N- 40N = 40N
Range 40N-120N contains 100N
Vectors - $400
a: .5 W
Ax = A sin q
=W sin (300)
= .5 W
Vectors - $500
c : 19.8 N
Ax = A cos q
= 28 N cos (450)
= 28 N (.707)
= 19.8 N
Momentum and Impuse - $100
d: 300 kg-m/s
P=mv
= 30 kg ( 10 m/s )
Momentum and Impulse - $200
a: 4.5 x 104 kg-m/s, east
p= mv
= 1.5 x 103 kg ( 30 m/s ), east
= 45 x 103 kg-m/s, east
= 4.5 x 104 kg-m/s, east
Momentum and Impulse - $300
C: 70 kg-m/s
J=F(t) = mDv =Dp
30 N*s =p1- (40 kg-m/s)
70 kg-m/s =p1
Momentum and Impulse - $400
d: 0 kg-m/s
Conservation of momentum
P (total) = P1+P2 = 0
m1v1+m2v2 = 0
4kg*3m/s +6kg*-2m/s = 0
0 kg-m/s
Momentum and Impulse- $500
c: -20 N*s
For every action there is an
equal and opposite reaction
Gravitational and Newton’s 3rd - $100
c: 100 N
For every action there is an
equal and opposite reaction,
Newton’s 3rd Law
Newton’s 3rd and Friction - $200
d: 9.8 N
F = ma
2
= (1kg) 9.8 m/s
Newton’s 3rd and Friction - $300
a: 10 N
Friction is the force opposite the
motion of the object. Constant
speed means that the system is
in equilibrium.
Newton’s 3rd and Friction - $400
b: 6N
Friction is the force opposite
the motion of the object.
Constant speed means that the
system is in equilibrium.
Newton’s 3rd and Friction - $500
b: 2
2
m/s
F
= ma
6N = 3kg ( a)
2 m/s2 = a
FINAL
CATEGORY:
Momentum
Place you Bet now
FINAL CATEGORY
If a Baseball bat is reduced in
mass by drilling out the center,
List 3 momentum factors that
are changed by swinging this
new bat. Be specific on details.
FINAL CATEGORY
1. Mass of the bat
2. Final velocity of the bat
3. Time of contact between the
bat and ball
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END OF GAME
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