Transcript Physic Final Review2

Physic Final Review
Velocity, Acceleration
&
Projectile Motion
Which graph best represents a
positive acceleration?
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Students studied a graph of the motion of a toy car.
What is the acceleration of the toy car in the time
interval between 15 and 20 seconds?
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The graph shows the velocity
of two different cars during a
period of ten seconds. During
which time interval is the
acceleration of Car 1 equal to
zero relative to Car 2.
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2 to 3 seconds
4 to 5 seconds
5 to 6 seconds
9 to 10 seconds
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The graph shows the velocity
of a vehicle recorded during a
4 hour time.
Which part of the graph
shows the greatest
acceleration rate?
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Diana hangs a lead cylinder with a force of 12 N
from a model bridge.
Which vector(s) accurately illustrate the reaction
force of the bridge on the lead cylinder?
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Andrew has several tables filled with data
describing moving objects. Which table has
data that describes an accelerating object?
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Which graph best represents a
constant acceleration?
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A student observes
an object moving. A
graph of the
movement is
shown.
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The object moves forward in a arc that
extends to the left of the observer at a
faster rate.
The object accelerates away from the
observer from left to right before coming
to a complete stop.
The object starts behind the observer
and moves past the observer before
returning to the starting point.
The object moves with a constant
velocity in the negative direction then
the positive direction then negative
again.
Which best
describes the
motion depicted on
the graph?
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Car 1 is moving north at 100
kilometers per hour (km/hr). Car 2
passes Car 1 by moving at 110
km/hr in the same direction.
From the frame of reference of the
driver in Car 1, how fast is Car 2
going?
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2.
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210 km/hr
110 km/hr
100 km/hr
10 km/hr
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A boat travels north at a rate of 25 kilometers per hour (km/h)
relative to the current of the river. The current of the river
moves south at a rate of 10 km/h relative to the ground. What
is the rate of motion of the boat relative to the ground?
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10 km/h south
15 km/h north
25 km/h south
35 km/h north
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A plane is flying east at
a velocity of 350 km/hr. A
passenger on the plane
walks towards the rear of
the plane at 3 km/hr.
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What is the
passenger’s velocity relative
to the captain who is flying
the plane?
3 km/hr
12 km/hr
347 km/hr
353 km/hr
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To avoid a time delay, the larger jet
refuels the smaller jet.
What must the speed of the two jets be
relative to the ground?
1. The smaller jet must be
faster to align with the
fuelling jet.
2. The fuelling jet must be
faster to avoid spilling.
3. The speed must change
depending on altitude.
4. The speed must be the
same for both jets.
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An observer is watching a passenger moving on a
moving sidewalk at the airport. The observer knows
that the sidewalk is moving at 5 km/h yet the
passenger appears to be moving at 12 km/h. Which
would best explain what the observer sees?
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The passenger is moving 7 km/h
in the same direction of the
sidewalk.
The passenger is moving 5 km/h
in the same direction of the
sidewalk.
The passenger is moving 7 km/h
in the opposite direction of the
sidewalk.
The passenger is moving 12
km/h in the opposite direction of
the sidewalk.
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Two students are riding bicycles. The diagram shows
their relative rates of motion.
What is the westward rate of motion of Student 1
relative to the ground?
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8 km/h
12 km/h
20 km/h
32 km/h
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A book is lying on a seat in a car that is moving at 50 kilometers per hour
(km/h). The driver says that the book is not moving. An outside observer
says the book is moving at 50 km/h because it is in the car. Which is the
most logical conclusion for these two statements?
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Motion is detected only if the car
accelerates and is measured by the
observer.
Motion is absolute, and the driver is
incorrect saying that the book has
no motion.
Motion is relative to a given frame
of reference, and both the driver
and observer are correct.
Motion is constantly changing so
neither person’s statement will be
correct when the car slows down.
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A train is moving south at 120
kilometers per hour (km/hr). Javier is
walking at 5 km/hr relative to the train.
Kassandra is moving toward the back of
the train at 7 km/hr.
From Kassandra’s frame of reference,
how fast is Javier moving?
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2 km/hr
12 km/hr
125 km/hr
127 km/hr
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A bus is moving east at
a velocity of 100 km/hr. A
passenger on the bus walks
towards the front of the bus at
7 km/hr. A police officer is
standing on the sidewalk as the
bus passes.
1. the driver of the bus
2. the bus passenger moving
0.2 km/hr east
3. the passenger in a car
passing the bus at 120
km/hr
4. the police officer standing
on the street as the bus
passes
The passenger’s
relative velocity is 107 km/hr to
which person?
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The current of a river is
flowing south at a speed of
10 kilometers per hour
(km/hr). The speedometer
on a motorboat moving
north indicates the speed of
the boat to be 14 km/hr. A
person is traveling north on a
bicycle along the riverbank.
How fast must the bicycle
rider travel so the boat and
bicycle appear to be moving
at the same speed to an
observer on the shore?
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140 km/hr
24 km/hr
14 km/hr
4 km/hr
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Dave is walking from the back of a train to the front of the train
at a rate of 6 kilometers per hour (km/h). The train is
traveling at a rate of 42 km/h. What is Dave’s speed, relative to
the ground?
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7 km/h
36 km/h
48 km/h
252 km/h
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