Physics 3204 Test 1 Projectile Motion
Name: _________________
Total: 34 marks
Part A: Multiple Choice: Place the best answer in the space provided on page 3 (14 marks)
1.
Which movement is an example of projectile motion?
A)
climbing a wall
B)
running around a track
C)
throwing a ball off a cliff
D)
walking at a constant velocity
2.
Which describes a ball thrown in the air that traces the path shown?
A) The acceleration of the ball at the top of its motion is zero.
B) The acceleration of the ball keeps changing.
C) The velocity of the ball at the top of its motion is zero.
D) The velocity of the ball keeps changing.
3.
A person runs horizontally off the end of a cliff and lands in the water 1.3 s later.
How high is the cliff?
A) 1.6 m
B) 6.4 m
C) 8.3 m
D) 13 m
4.
A marble is launched horizontally from a table at 12 m/s and lands on the floor
0.25 s later. What is the range of the marble?
A) 0.021 m
B) 0.31 m
C) 3.0 m
D) 48 m
5.
What is the direction of acceleration for any projectile?
A) up
B) down
C) left
D) right
6.
What is the maximum height of a projectile launched at 120 m/s at an angle of
30.0o above the horizontal?
A) 3.1 m
B) 5.3 m
C) 180 m
D) 550 m
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7.
Two arrows are launched at the same time with the same initial velocity. Arrow X is
fired at an angle of 60o to the horizontal, and arrow Y is fired at an angle of 45o to
the horizontal. Which best describes the motion of arrow X compared to the
motion of arrow Y?
A) Arrow X has a longer flight time and longer horizontal range.
B) Arrow X has a longer flight time and shorter horizontal range.
C) Arrow X has a shorter flight time and longer horizontal range.
D) Arrow X has a shorter flight time and shorter horizontal range.
8.
What are the horizontal and vertical components of a projectile launched with a
velocity of 16.0 m/s at an angle of 40.0o above the horizontal?
9.
A projectile is launched from ground level with an initial velocity of 65 m/s at an
angle of 60.0o above the horizontal. How much time does it take to return to ground
level?
A) 2.4 s
B) 3.4 s
C) 5.6 s
D) 11 s
10.
An egg is thrown in the air with a velocity of 15 m/s at 45o above the horizontal.
What is its horizontal velocity and vertical acceleration when it reaches the
maximum height?
horizontal
velocity (m/s)
11.
vertical
acceleration (m/s2)
A)
0
0
B)
0
-9.8
C)
11
0
D)
11
-9.8
If a coin is pushed horizontally from a 1.2 m high table and lands 0.68 m from the
base, what was the speed at which it left the table?
A) 1.4 m/s
B) 1.9 m/s
C) 2.8 m/s
D) 5.7 m/s
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12.
A marble is launched horizontally from the top of a building. How far has the
marble fallen when the vertical component of its velocity is 16 m/s [down]?
A) 0.82 m
B) 1.6 m
C) 13 m
D) 26 m
13.
Which of the following statements is TRUE when comparing an object dropped vertically,
and an object projected horizontally?
A) The dropped object will reach the ground before the projected object.
B) The projected object will reach the ground before the dropped object.
C) The dropped object and projected object will reach the ground at the same time.
D) The dropped object and the projected object have the same horizontal velocity.
14.
Which represents the velocity components of a projectile?
Place the answers to Multiple Choice in the spaces below. (Thanks!!)
1. ______
2. ______
3. ______
8. ______
9. ______
10. _____
4. ______
11.______
5. ______
6. ______ 7. ______
12. _____
13. _____
14. _____
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Part B: Constructed Response: Show work!! (20 marks)
15.
A strike in baseball occurs between 0.50 m and 1.0 m directly above home plate. A
pitcher, 18 m from home plate, releases a ball, in line with the plate, parallel to the
ground. If the ball is released 2.0 m above the ground, with a velocity of 36.0 m/s,
would the pitch be a strike? Show calculations.
3
16.
When juggling two balls, the first ball was thrown from the right hand to the left
hand at an angle of 65 o to the horizontal with an initial velocity of 1.5 m/s.
a. Calculate the time the ball remains in the air. Assume the ball is caught
from the same height from which it was released.
2
b. How far apart should the juggler’s hands be to catch the first ball?
1
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17.
A stone is thrown upward from the top of a 300.0 m high cliff at a velocity of
5.0 m/s, and an angle of 75 o to the horizontal.
A) How long before the stone reaches the ground?
2
B) How far horizontally from the bottom of the cliff does the stone land?
1
C) What is the stone’s final velocity as it hits the ground?
2
18.
A movie scene has a car drive off a cliff.
A)If the car took 4.5 s to reach the ground, how high was the cliff?
1
B)
If the car had an initial horizontal velocity of 120 km/h, how far from the
cliff bottom did the car land?
1
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19.
On Homer's attempt to jump a canyon he skateboards down a hill. At the edge of
the canyon there is a ramp that goes up at an angle of 35o. Homer’s speed when he
leaves the end of the second ramp is 42.0 m/s. The canyon is 125 m wide and the
other edge is 5 m above his take off point.
A)
What is his vertical and horizontal speeds when he leaves the takeoff ramp?
B)
How long does it take for him to go across the canyon (R=125m)?
C)
Does Homer make it across? Show workings.
[2]
[2]
[3]
Bonus: [1]
What is the name of the canyon?
______________________________
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