Unit 2 Review

1

• Unit 2 Review
• Nonlinear Motion

2
The mass of a paper clip is approximately (A) 1
106 kg (B) 1 103 kg (C) 1 103 kg (D) 1
106 kg
3
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 planes velocity? (A)
866 km/h (B) 433 km/h (C) 650 km/h (D) 375
km/h
4
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 boats 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
5
A projectile launched at an angle of 45 above
the horizontal travels through the air. Compared
to the projectiles 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
6
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
7
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
8
A student standing on the roof of a
50.0-meter-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
9
A student standing on the roof of a
50.0-meter-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
10
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
11
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
12
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 balls initial velocity?
13
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 balls initial velocity? Vh 40.9 m/s
14
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
15
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
16
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
17
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
18
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 balls initial velocity?
19
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 balls initial velocity?
20
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?
21
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?
22
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?
23
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?
24
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
25
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 (C) 9.8 m/s (B) 3.1 m/s (D)
24 m/s
26
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
objects velocity at point A compare with the
magnitude of the horizontal component of the
objects velocity at point B? (A) AB (B)
AgtB (C) AltB (D) NEI
27
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
objects velocity at point A compare with the
magnitude of the vertical component of the
objects velocity at point B? (A) AB (B)
AgtB (C) AltB (D) NEI
28
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
29
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 balls initial velocity? (A) 8.6 m/s (C)
12 m/s (B) 9.8 m/s (D) 15 m/s
30
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 balls initial velocity? (A) 8.6
m/s (B) 9.8 m/s (C) 12 m/s (D) 15 m/s
31
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 balls initial
velocity is approximately (A) 3.6 m/s (B) 4.9
m/s (C) 7.0 m/s (D) 13 m/s
32
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
33
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
balls initial velocity is (A) 5.0 m/s (B)
8.7 m/s (C) 9.8 m/s (D) 10 m/s