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PHYS Straighterline Question & Answers 2024
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PHYS Straighterline Question & Answers2024
An amusement park game consists of throwing a quarter into a small
bowl. If you win, you get to take home a giant purple stuffed elephant.
The dish is on a shelf that is 0.4 m above the point where the quarter
leaves your hand. The horizontal distance between the bowl and the
place where the quarter leaves your hand is 1.8 m. Ignoring air drag, if
you toss the quarter at an angle of 60°, what initial velocity is needed to
bring home the giant purple stuffed elephant? - Correct Answers
✅4.8 m / s
If the x-component of a vector is 3 and the y-component is 4, what is
the magnitude of the vector? - Correct Answers ✅5
Which of the following is involved in uniform circular motion? - Correct
Answers ✅constant angular velocity
As shown, a crate of oranges and a crate of apples, each with a
different mass, are attached by a rope (with tension Toa). A second
rope (To ) is attached to the crate of oranges, and the entire system is
pulled with a constant acceleration a by this rope. Which of the
following is true of the tensions? - Correct Answers ✅Toa > To
How can you calculate the magnitude of a vector using scalar products?
- Correct Answers ✅Multiply it by itself and take the square root.
,PHYS Straighterline Question & Answers
2024
Suppose you weigh an object and the reading you get from the scale is
0.0070 kg. How many significant digits does your measurement have? -
Correct Answers ✅Two
Consider two objects sliding down an incline without rolling. If the
objects don't have the same mass, the heavier object will accelerate at
a faster rate than the lighter one. - Correct Answers ✅false
Which of the following statements concerning friction between the
surfaces of two objects is correct? - Correct Answers ✅The force of
friction mostly depends on the nature of the two surfaces.
Calculate x=vt+1/2at2, where v = 0.227 m/s. t = 11.1s, and a = 9.80
m/s2. - Correct Answers ✅606 m
Which of the following statements concerning friction is incorrect? -
Correct Answers ✅The force of static friction ( fs ) between parallel
surfaces in contact is given by: fs = μsN.
A car travels with a speed of 3.5 m / s, and then accelerates to 5.5 m / s
in 4 s. Which of the following is the average acceleration of the car? -
Correct Answers ✅0.5 m / s2
,PHYS Straighterline Question & Answers
2024
If the cross product of a vector of length 5 and a vector of length 3
results in a vector of length 10, what is the angle between them? -
Correct Answers ✅42°
A vector is quantity that requires both magnitude and ________. -
Correct Answers ✅direction
King Kong is holding a woman on top of a skyscraper when she
suddenly slips out of his hand. How tall is the building if Superman has a
minimum time of 2.30 s to catch the woman before she hits the
ground? - Correct Answers ✅25.9 m
Kylie throws Kyra a kiwi. The kiwi leaves Kylie's hand at a height of 1.3
m from the ground and Kyra grabs it out of the air at a height of 1.6 m.
Kylie throws the kiwi at an angle of 33° relative to the horizontal. The
kiwi is in the air for 1.1 s. How far apart are Kylie and Kyra standing?
(Assume there is no drag force that no wind is blowing.) - Correct
Answers ✅9.6 m
A projectile is launched from a height of 250 m with initial horizontal
velocity of 50 m/s. What is the horizontal range of the projectile? -
Correct Answers ✅357 m
, PHYS Straighterline Question & Answers
2024
Imagine that you push down on an object that is sitting on a frictionless
table. Which of the following diagrams includes all the forces acting on
the object? - Correct Answers ✅F W down, N up
Your cat chases a spider across the floor. Its position is a function of
time is r + (1.2m/s)ti + (0.7m + (0.5m/s2)t2)j, where the origin is the
southwest corner of the floor. Find the average speed of the cat
between t = 0.0s and t = 4.0s - Correct Answers ✅2.3 m/s
The position of an object along the x-axis is described by the formula x
= 3t 2 − 2t. Which of the following are the correct formulas for the
velocity and acceleration of the object? - Correct Answers ✅v = 6t −
2, a = 6
Using the conversion factor between kilograms and pounds, 1 kg =
2.205 lb, calculate how many pounds are in 2.00 kg. - Correct Answers
✅4.41 lb
An experimental new ride at an amusement park begins by spinning
patrons about a circle of radius R with constant speed v. At some point
during the ride the speed doubles and the spokes extend, doubling the
radius. After this occurs, what is the acceleration of the patrons in
terms of the original acceleration, a ? - Correct Answers ✅2a
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