Transcript Unit 2 Review

Unit 2 Review
Nonlinear Motion
The mass of a paper clip is approximately
(A) 1 × 106 kg
(B) 1 × 103 kg
(C) 1 × 10–3 kg
(D) 1 × 10–6 kg
An airplane flies with a velocity of 750
km/hour, 30.0° south of east. What is
the magnitude of the eastward component of
the plane’s velocity?
(A) 866 km/h
(B) 433 km/h
(C) 650 km/h
(D) 375 km/h
A motorboat, which has a speed of 5.0 m/s in
still water, is headed east as it crosses a river
flowing south at 3.3 m/s. What is the
magnitude of the boat’s resultant velocity
with respect to the starting point?
(A) 3.3 m/s
(B) 5.0 m/s
(C) 8.3 m/s
(D) 6.0 m/s
A projectile launched at an angle of 45°
above the horizontal travels through the air.
Compared to the projectile’s theoretical path
with no air friction, the actual trajectory of
the projectile with air friction is
(A) lower and shorter
(B) lower and longer
(C) higher and shorter
(D) higher and longer
Two stones, A and B, are thrown horizontally from
the top of a cliff. Stone A has an initial speed of 15
meters per second and stone B has an initial speed
of 30 meters per second. Compared to the time it
takes stone A to reach the ground, the time it takes
stone B to reach the ground is
(A) the same
(B) twice as great
(C) half as great
(D) four times as great
A ball dropped from rest falls freely until
it hits the ground with a speed of 45
m/s. The time during which the ball is in
free fall is approximately
(A) 1 s
(B) 2 s
(C) 3 s
(D) 5 s
A student standing on the roof of a 50.0meter-high building kicks a stone at a
horizontal speed of 4.00 meters per second.
How much time is required for the stone to
reach the level ground below?
(A) 3.19 s
(B) 5.10 s
(C) 10.2 s
(D) 12.5 s
A student standing on the roof of a 50.0meter-high building kicks a stone at a
horizontal speed of 4.00 meters per second.
How far from the edge of the building does
the stone to hit the level ground below?
(A) 12.8 m
(B) 0.80 m
(C) 40.8 m
(D) 50.0 m
A ball is thrown horizontally at a speed of 24
meters per second from the top of a cliff. If
the cliff is 125 m high, how much time
elapses until the ball hits the ground?
(A) 2.0 s
(B) 5.0 s
(C) 6.2 s
(D) 12.5 s
A target is placed 117 m from the base of a
cliff. If the cliff is 125 m high, how fast does
the ball have to be thrown to hit the target?
(A) 5.2 m/s
(B) 23.4 m/s
(C) 120 m/s
(D) 585 m/s
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. What is the horizontal component
of the golf ball’s initial velocity?
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. What is the vertical component of
the golf ball’s initial velocity?
Vh = 40.9 m/s
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. How much time does the ball take
to reach the maximum height?
Vh = 40.9 m/s
Vv = 28.7 m/s
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. How high does it go?
Vh = 40.9 m/s
Vv = 28.7 m/s tv = 2.9 s
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. How long does it take to reach the
ground?
Vh = 40.9 m/s
Vv = 28.7 m/s
tv = 2.9 s
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. How far does it go before hitting
the ground?
Vh = 40.9 m/s
Vv = 28.7 m/s
tv = 2.9 s
A golf ball is hit with an initial velocity of 50
m/s at an angle of 45 degrees above the
horizontal. What is the horizontal component
of the golf ball’s initial velocity?
A golf ball is hit with an initial velocity of 50
m/s at an angle of 45 degrees above the
horizontal. What is the vertical component of
the golf ball’s initial velocity?
A golf ball is hit with an initial velocity of 50
m/s at an angle of 45 degrees above the
horizontal. How much time does the ball
does it take to reach the maximum height?
A golf ball is hit with an initial velocity of 50
m/s at an angle of 45 degrees above the
horizontal. How high does it go?
A golf ball is hit with an initial velocity of 50
m/s at an angle of 45 degrees above the
horizontal. How long does it take to reach the
ground?
A golf ball is hit with an initial velocity of 50
m/s at an angle of 45 degrees above the
horizontal. How far does it go before hitting
the ground?
A ball is thrown horizontally at a speed of 24
meters per second from the top of a cliff. If
the cliff is 125 m high, how much far from
the edge of the cliff does the ball hit?
(A) 24 m
(B) 72 m
(C) 120 m
(D) 585 m
A ball thrown vertically upward reaches a
maximum height of 30 meters above the
surface of Earth. At its maximum height, the
speed of the ball is
(A) 0.0 m/s
(B) 3.1 m/s
(C) 9.8 m/s
(D) 24 m/s
An object was projected
horizontally from a tall
cliff. The diagram shows
the path of the object,
neglecting friction. How
does the magnitude of the
horizontal component of the object’s velocity
at point A compare with the magnitude of the
horizontal component of the object’s velocity
at point B?
(A) A=B (B) A>B (C) A<B (D) NEI
An object was projected
horizontally from a tall
cliff. The diagram shows
the path of the object,
neglecting friction. How
does the magnitude of the
vertical component of the object’s velocity at
point A compare with the magnitude of the
vertical component of the object’s velocity at
point B?
(A) A=B (B) A>B
(C) A<B
(D) NEI
A golf ball is given an initial speed of 20 m/s
and returns to level ground. Which launch
angle above level ground results in the ball
traveling the greatest horizontal distance?
[Neglect friction.]
(A) 60°
(B) 45°
(C) 30°
(D) 15°
A golf ball is hit with an initial velocity of 15
m/s at an angle of 35 degrees above the
horizontal. What is the vertical component of
the golf ball’s initial velocity?
(A) 8.6 m/s
(B) 9.8 m/s
(C) 12 m/s
(D) 15 m/s
A golf ball is hit with an initial velocity of 15
meters per second at an angle of 35 degrees
above the horizontal. What is the horizontal
component of the golf ball’s initial velocity?
(A) 8.6 m/s
(B) 9.8 m/s
(C) 12 m/s
(D) 15 m/s
A child kicks a ball with an initial velocity of 8.5 meters per
second at an angle of 35º with the horizontal, as shown. The ball
has an initial vertical velocity of 4.9 meters per second and a total
time of flight of 1.0 second.
The horizontal component of the ball’s initial velocity is
approximately
(A) 3.6 m/s (B) 4.9 m/s (C) 7.0 m/s (D) 13 m/s
A child kicks a ball with an initial velocity of 8.5 meters per
second at an angle of 35º with the horizontal, as shown. The ball
has an initial vertical velocity of 4.9 meters per second and a total
time of flight of 1.0 second.
The maximum height reached by the ball is approximately
(A) 1.2 m
(B) 2.5 m
(C) 4.9 m
(D) 8.5 m
A soccer player kicks a ball with an initial
velocity of 10 m/s at an angle of 30° above
the horizontal. The horizontal component of
the ball’s initial velocity is
(A) 5.0 m/s
(B) 8.7 m/s
(C) 9.8 m/s
(D) 10 m/s