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Linear
Motion MULTIPLE CHOICE. Choose the one alternative that best completes
the statement or answers the question. 1)
Galileo's use of inclined planes allowed him to
effectively A) slow down the
acceleration of free fall. B) increase the
acceleration beyond that of free fall. C) eliminate the
acceleration of free fall. D) all of these. E) none of these.
2)
Which of the following is not a vector quantity? A) velocity B) speed C) acceleration D) None are vector
quantities. E) All are vector
quantities.
3)
An airplane that flies at 100 km/h with a 10 km/h tailwind
travels at 110 km/h relative to the ground. If
it instead flies into
a 10 km/h headwind, its groundspeed is A) 90 km/h. B) 100 km/h. C) 110
km/h. D) 120 km/h.
4)
The two measurements necessary for calculating average
speed are A) acceleration and
time. B) velocity and time. C) distance and time. D) distance and
acceleration. E) velocity and
distance. 5)
The average speed of a horse that gallops a distance of 10
kilometers in a time of 30 minutes is A) 10 km/h. B) 20 km/h. C) 30 km/h. D) more than 30 km/h.
6)
What is the acceleration of a car that maintains a
constant velocity of 100 km/hr for 10 seconds? A) 0 B)
10 km/hr s C) 10 m/hr s D) 1000 km/hr s 7)
As an object freely falls downward, its A) velocity increases.
B) acceleration increases. C) both of these. D) none of these. 8)
A hockey puck is set in motion across a frozen pond. If
ice friction and air resistance are neglected, the force required to
keep the puck sliding at
constant velocity is A) zero newtons. B) equal to the weight
of the puck. C) the weight of the
puck divided by the mass of the puck. D) the mass of the puck
multiplied by 9.8 meters per second per second. E) none of these. 9)
If an object falling freely downward were somehow equipped
with a speedometer on a planet where the acceleration due to gravity is
40 meters per second per second, then its speed reading would increase
each second by A) 10 m/s. B) 20 m/s. C) 30 m/s. D) 40 m/s. E) depends on its
initial speed.
10)
If an object falling freely downward were somehow equipped
with an odometer
to measure the distance it travels, then the amount of distance it
travels
each succeeding second would be A) constant. B) less and less. C) greater than the
second before. 11)
Ten seconds after starting from rest, an object falling
freely downward will have a speed of about A) 10 m/s. B) 50 m/s. C) 100 m/s. D) more than 100 m/s.
12)
If an object falls with constant acceleration, the
velocity of the object must A) be constant also. B) continuously change
by the same amount each second. C) continuously change
by varying amounts depending on its speed. D) continuously
decrease. E) none of these. 13)
A heavy object and a light object are dropped at the same
time from rest in a vacuum. The heavier
object reaches the ground A) sooner than the
lighter object. B) at the same time as
the lighter object. C) later than the
lighter object. 14)
If a car increases its velocity from zero to 60 km/h in 10
seconds, its acceleration is A) 3 km/h s. B) 6 km/h s. C) 10 km/h s. D) 60 km/h s. E) 600 km/h s.
15)
If a rocket initially at rest accelerates at a rate of 50
m/s2 for one minute, its speed will be A) 50 m/s. B) 500 m/s. C) 3000 m/s. D) 3600 m/s. E) none of these. 16)
Drop a rock from a 5-m height and it accelerates at 10
m/s2 and strikes the ground 1 s later. Drop the same rock from a height
of 2.5 m and its acceleration of fall is A) about half. B) the same. C) more.
17)
A ball tossed vertically upward rises, reaches its highest
point, and then
falls back to its starting point. During this time the acceleration of
the
ball is always A) in the direction of
motion. B) opposite its velocity. C) directed upward. D) directed downward. 18)
While a car travels around a circular track at constant
speed its A) acceleration is
zero.
B) velocity is zero. C) both of these. D) none of these.
19)
A car accelerates from rest at 2 meters per second per
second. What is its speed 3 seconds after
the car starts moving? A) 2 m/s B) 3 m/s C) 4 m/s D) 6 m/s E) none of these
20)
A ball is thrown upwards and caught when it comes back
down. Neglecting air resistance, its speed when caught is A) more than the speed
it had when thrown upwards. B) less than the speed
it had when thrown upwards. C) the same as the
speed
it had when thrown upwards. 21)
An object travels 8 meters in the first second of travel,
8 meters again during the second second of travel, and 8 meters again
during the third second. Its acceleration
in meters per second per second is A) 0. B) 5. C) 8. D) 10. E) more than 10. 22)
At one instant an object in free fall is moving downward
at 50 meters per second. One second later
its speed is about A) 25 m/s. B) 50 m/s. C) 55
m/s. D) 60 m/s. E) 100
m/s. 23)
At one instant an object in free fall is moving upward at
50 meters per second. One second later its
speed is about A) 100 m/s. B) 60 m/s. C) 55
m/s. D) 50 m/s. E) 40
m/s. 24)
Disregarding air resistance, objects fall with constant A) velocity. B) speed. C) acceleration. D) distances each successive second. 25)
A ball is thrown upwards and caught when it comes back
down. In the presence of air resistance,
the speed with
which it is caught is A) more than the speed
it had when thrown upwards. B) less than the speed
it had when thrown upwards. C) the same as the
speed
it had when thrown upwards.
26)
Starting from rest, the distance a freely-falling object
will fall in 0.5 seconds is about A) 0.5 m. B) 1.0 m. C) 1.25 m. D) 5.0 m. E) none of these. 27)
One half second after starting from rest, a freely-falling
object will have a speed of about A) 20 m/s. B) 10 m/s. C) 5 m/s. D) 2.5 m/s. E) none of these.
28)
An object falls freely from rest on a planet where the
acceleration due to
gravity is 20 meters per second squared. After 5 seconds, the object
will
have a speed of A) 5 m/s. B) 10 m/s. C) 20
m/s. D) 50 m/s. E) 100
m/s. 29)
An object falls freely from rest on a planet where the
acceleration due to
gravity is 20 meters per second squared. In
the first
5 seconds it falls a distance of A) 100 m. B) 150 m. C) 250 m. D) 500 m. E) none of these.
30)
An apple falls from a tree and hits the ground 5 meters
below. It hits the
ground with a speed of about A) 5 m/s. B) 10 m/s. C) 15 m/s. D) 20 m/s. E) not enough
information given to estimate.
31)
It takes 6 seconds for a stone to fall to the bottom of a
mine shaft. How deep is the shaft? A) about 60 m B) about 120 m C) about 180 m D) more than 200 m 32)
If you drop an object, it will accelerate downward at a
rate of 9.8 meters
per second per second. If you instead
throw it downwards, its acceleration (in the absence of air resistance)
will be A) less than 9.8 meters
per second per second. B) 9.8 meters per
second
per second. C) greater than 9.8
meters per second per second. 33)
In each second of fall, the distance a freely falling
object will fall is A) about 5 m. B) about 10 m. C) the same, but not 5
m
or 10 m. D) increasing. E) none of these. 34)
If a projectile is fired straight up at a speed of 10 m/s,
the time it takes to reach the top of its path is about A) 1 second B) 2 seconds C) 10 seconds D) not enough information to estimate 35)
If a projectile is fired straight up at a speed of 10 m/s,
the total time to return to its starting position is about A) 1 second. B) 2 seconds. C) 10 seconds. D) 20 seconds. E) not enough
information to estimate. 36)
Consider drops of water that leak from a dripping faucet.
As the drops fall they A) get closer together.
B) get farther apart. C) remain at a
relatively fixed distance from one another. 37)
Disregarding air drag, how fast must you toss a ball
straight up in order for it to take 2 seconds to return to the level
from which you tossed it? A) 5 m/s B) 7.5 m/s C) 10 m/s
D) 15 m/s E) 20
m/s 38)
A car accelerates at 2 meters per second per second. Assuming the car starts from rest, how much
time does it need to accelerate to a speed of 30 m/s? A) 2 seconds B) 15 seconds C) 30 seconds D) 60 seconds E) none of these
39)
A car accelerates from rest for 5 seconds until it reaches
a speed of 20 m/s. What is the car's acceleration in meters per second
per second? A) 1 B)
2 C) 3 D)
4 E) 5 40)
Ten seconds after starting from rest, a car is moving at
40 m/s. What is the car's acceleration in meters per second per second?
A) 0.25 B)
2.8 C) 4.0 D)
10 E) 40 41)
When a rock thrown straight upwards gets to the exact top
of its path, its A) velocity is zero and
its acceleration is zero. B) velocity is zero and
its acceleration is about 10 meters per second per second. C) velocity is about 10
m/s and its acceleration is zero. D) velocity is about 10
m/s and its acceleration is about 10 meters per second per second. E) none of these.
42)
A bullet is dropped from the top of the Empire State
Building while another bullet is fired downward from the same location.
Neglecting air resistance, the acceleration of A) the fired bullet is
greater. B) the dropped bullet
is
greater. C) each bullet is 9.8
meters per second per second.
A) (100 - 4.9) m. B) (100 + 4.9) m. C) 100 m. D) 4.9 m. E) none of these. 44)
A bullet is fired straight down from the top of a high
cliff. Neglecting air resistance, the acceleration of the bullet in
meters per second per second is A) less than 9.8. B) 9.8. C) more than
9.8. 45)
A bullet is dropped into a river from a very high bridge.
At the same time, another bullet is fired from a gun, straight down
towards the water. Neglecting air resistance, the acceleration just
before striking the water A) is greater for the
dropped bullet. B) is greater for the
fired bullet. C) is the same for each
bullet. D) depends on how high
they started. E) none of these.
46)
Someone standing at the edge of a cliff throws one ball
straight up and another ball straight down at the same initial speed.
Neglecting air resistance, the
ball to hit the ground below the cliff with the greater speed will be A) the one thrown
upward. B) the one thrown
downward. C) neither - they will
both hit with the same speed.
47)
A ball is thrown upwards. Neglecting air resistance, what
initial upward speed does the ball need to remain in the air for a
total time of 10 seconds? A) about 50 m/s B) about 60 m/s C) about 80 m/s D) about 100 m/s E) about 110 m/s 48)
A ball is thrown 125 meters upward and then falls the same
distance back to Earth. Neglecting air
resistance, its total time
in the air is about A) 5 seconds. B) 10 seconds. C) 15 seconds. D) more than 20 seconds.
49)
A pot falls from a ledge and hits the ground 45 m below.
The speed with which it hits the ground is about A) 30 m/s. B) 60 m/s. C) 120 m/s. D) more than 120 m/s. 50)
The vertical height attained by a basketball player who
achieves a hang time of a full 1 s is about A) 0.8 m. B) 1 m. C) 1.2 m. D) 2.5 m. E) more than 2.5 m. 51)
A man leans over the edge of a cliff and throws a rock
upward at 4.9 m/s. Neglecting air
resistance, one second later the rock's speed is A) zero. B) 4.9 m/s. C) 9.8 m/s. D) 14.7 m/s. E) none of the above. 52)
A man leans over the edge of a cliff and throws a rock
upward at 4.9 m/s.
Neglecting air resistance, two seconds later the rock's
speed is A) zero. B) 4.9 m/s. C) 9.8 m/s. D) 14.7 m/s. E) none of the above.
53)
A man leans over the edge of a cliff and throws a rock
upward at 4.9 m/s. How far below the level
from which it was thrown is the rock 2 seconds later? A) 4.9 m B) 9.8 m C) 14.7 m D) 19.6 m
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