Exam 1 Questions from Canvas
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Pennsylvania State University *
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211
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Apr 3, 2024
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PHYHS 211-300K Spring 2021 Exam 1 Part 1 Student values for quantities are assigned within the Canvas quiz. In these questions, those assigned values are represented by a variable inside brackets such as [m]-kg where m is the mass value in kilograms. Question #1 Alternative 1 (5 pts) Zippy Zebrafin accelerates at [a] m/s
2
over a displacement of [x] m. Zippy’s initial velocity is [vi] m/s. What is Zippy’s final velocity? Express your answer in m/s. Show your formula(s) in your assignment submission. Alternative 2 (5 pts) Softshell Seymour increased their velocity at the average rate of [a] m/s
2
for [t] s, finishing with a velocity of [v] m/s. What was Seymour’s initial velocity ? Express your answer in m/s. Show your formula(s) in your assignment submission. Question #2 Alternative 1 (5 pts) The figure shows a motion diagram for a muscle car. The muscle car in this motion diagram has ○ a positive acceleration. ○ zero acceleration. ○ a negative acceleration. Alternative 2 (5 pts) The figure shows a motion diagram for a muscle car. The velocity of muscle car in this motion diagram is ○ increasing. ○ constant. ○ decreasing. Alternative 3 (5 pts) The figure shows a motion diagram for a sailing seahorse. The velocity of the sailing seahorse in this motion diagram is ○ increasing. ○ constant. ○ negative.
Alternative 4 (5 pts) The figure shows a motion diagram for a muscle car. The muscle car in this motion diagram has ○ a positive acceleration. ○ zero acceleration. ○ a negative acceleration. Alternative 5 (5 pts) The figure shows a motion diagram for a sailing seahorse. The velocity of the sailing seahorse in this motion diagram is ○ increasing. ○ constant. ○ decreasing. Alternative 6 (5 pts) The figure shows a motion diagram for a muscle car. The muscle car in this motion diagram has ○ a positive acceleration. ○ zero acceleration. ○ negative acceleration. Alternative 7 (5 pts) The figure shows a motion diagram for a muscle car. The muscle car in this motion diagram has ○ a positive acceleration. ○ zero acceleration. ○ a negative acceleration. Alternative 8 (5 pts) The figure shows a motion diagram for a sailing seahorse. The velocity of the sailing seahorse in this motion diagram is ○ increasing. ○ constant. ○ decreasing.
Question #2 (5 pts) The sag S in meters of a clothsline hanging between two poles depends on the total length of the clothsline L in meters and the thickness t in meters of the rope that the clothsline is made from according to S
[x]
=L
y
t
[z]
. What is the value of y? Show your formula(s) and calculation(s) in your assignment upload. Question #3 (5 pts) You toss a model plane at an angle of [q] degrees above horizontal with an initial speed of [vi] m/s. What is the magnitude of the acceleration of the plane when it is at an altitude [x]/[y] of the way up to its maximum height above the ground? Ignore air resistance. Express your answer in m/s
2
. Explain your answer in the assignment upload. Question #4 (5 pts) Two vectors A
and B
have the following components: A
x
= [Ax] and A
y
= [Ay] B
x
= [Bx] and B
y
= [By] What is the magnitude of the vector sum C
=
A
+
B
? Report your answer to one decimal place (for example 10.2). Question #5 Alternative 1 (5 pts) How many times does Fishbone Freddy change from negative to positive velocity in the position versus time graph? Alternative 2 (5 pts) How many times does Fishbone Freddy's velocity equal zero in the position versus time graph?
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Alternative 3 (5 pts) How many times does Dotty Dolpin's velocity equal zero in the position versus time graph? Alternative 4 (5 pts) How many times does Fishbone Freddy change from positive to negative velocity in the position versus time graph? Alternative 5 (5 pts) How many times does Dotty Dolpin change from positive to negative velocity in the position versus time graph? Alternative 6 (5 pts) How many times does Dotty Dolpin change from negative to positive velocity in the position versus time graph?
PHYS 211-300K Spring 2021 Exam 1 Part 2 Reminder: Student values for quantities are assigned within the Canvas quiz. In these questions, those assigned values are represented by a variable inside brackets such as [m]-kg where m is the mass value in kilograms. Question #1 Alternative 1 (7 pts) Helen Helicopter accelerates forward to [v] m/s at a uniform [a] m/s
2
. Helen travels a distance of [x] m while accelerating. How much time does it take Helen to travel the [x] m? Express your answer in seconds. Show your formula(s) and calculation(s) in your assignment submission. Alternative 2 (7 pts) Hamburg Harry is initially moving at [vi] m/s and accelerates forward uniformly at [a] m/s
2
. How much time after beginning to accelerate does it take Hamburg to move [x] m? Express your answer in seconds. Show your formula(s) and calculation(s) in your assignment submission. Question #2 Alternative 1 (6 pts) What is the average velocity in m/s of the quadrurobot between [t1] and [t2] given its position versus time graph shown in the figure? Show your formula(s) and calculation(s) in your assignment submission. Alternative 2 (6 pts) What is the acceleration in m/s
2
of the pentapod between [t1] and [t2] given its position versus time graph shown in the figure? Show your formula(s) and calculation(s) in your assignment submission. Question #3 Alternative 1 (6 pts) A car with poor tires on a wet road accelerates at a steady rate of about [a] m/s
2
. How far will the car travel in meters as it goes from rest to [v] m/s? Show your formula(s) in your assignment submission.
Alternative 2 (6 pts ) A car with good tires on a dry road can accelerates at a steady rate of about -[a] m/s
2
when braking. If the car is initially traveling at [vi] m/s, what is its stopping distance in meters? Show your formula(s) in your assignment submission. Question #4 (15 pts) Gary Grasshopper jumps up from the ground with an initial velocity of [v] m/s at an angle of [q]
○
above horizontal and lands at the same height. How far away from its initial position will Gary land? Express your answer in meters. Show your formula(s) in your assignment submission. Question #5 (6 pts) A joey jumps straight up with an initial speed of [v] m/s. How much time does it take for the joey to reach its maximum height above the ground? Show your formula(s) in your assignment submission. Question #6 (10 pts) Misty Mower starts from rest and accelerates at [a] m/s
2
through a displacement of [x] m. Toby Tower moves with a constant velocity through the same displacement as Misty in the same amount of time. How fast does Toby move in m/s? Show your formula(s) and calculation(s) in your assignment submission. Question #7 (14 pts) You throw a smooth stone [q]
○
below horizontal at [vi] m/s from a height of [y] m above the ground. What is the speed of the stone in m/s when it is 0.25 m above the ground? Show your formula(s) and calculation(s) in your assignment submission. Question #8 (6 pts) What angle does the stone in the previous question strike the ground at? Express your answer in degrees below horizontal as positive. Show your formula(s) in your assignment submission.
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