CONCEPTUAL INTEGRATED SCIENCE (PEARSON+
3rd Edition
ISBN: 2818440059223
Author: Hewitt
Publisher: PEARSON+
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Textbook Question
Chapter 2, Problem 58TS
A different scaffold that weighs 400 N supports two painters, one 500 N and the other 400 N. The reading in the left scale is 800 N. What is the reading in the right-hand scale?
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SARET CRKS AUTOWAY
12. A stone is dropped from the top of a cliff. It is seen to hit the ground below
after 3.55 s. How high is the cliff?
13. A ball is dropped from rest at the top of a building that is 320 m tall. Assuming
no air resistance, what is the speed of the ball just before it strikes the ground?
14. Estimate (a) how long it took King Kong to fall straight down from the top
of the Empire State Building (280m high), and (b) his velocity just before
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Useful equations
For Constant Velocity:
V =>
D
X = V₁t + Xo
For Constant Acceleration:
Vr = V + at
X = Xo+Vot +
v=V+2a(X-Xo)
\prom = V +V
V velocity
t = time
D Distance
X = Final Position
Xo Initial Position
V = Final Velocity
Vo Initial Velocity
a = acceleration
For free fall
Yf
= Final Position
Yo Initial Position
g = 9.80
m
$2
For free fall:
V = V + gt
Y=Yo+Vo t +
+gt
V,² = V₁²+2g (Y-Yo)
V+Vo
Vprom=
2
6
Solve the problems
A 11 kg weight is attached to a spring with constant k = 99 N/m and subjected to an external force
F(t) =-704 sin(5t). The weight is initially displaced 4 meters above equilibrium and given an
upward velocity of 5 m/s. Find its displacement for t> 0.
y(t)
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Chapter 2 Solutions
CONCEPTUAL INTEGRATED SCIENCE (PEARSON+
Ch. 2 - What were Aristotles two main classifications of...Ch. 2 - Did Aristotle believe that forces are necessary to...Ch. 2 - What two main ideas of Aristotle did Galileo...Ch. 2 - Which dominated Galileos way of extending...Ch. 2 - What is the name of the property of objects to...Ch. 2 - Which depends on gravity: weight or mass?Ch. 2 - Where would your weight be greater: on Earth or on...Ch. 2 - What are the units of measurement for weight and...Ch. 2 - One kg weighs 10 N on Earth. Would it weigh more...Ch. 2 - Which has the greater density: 1 kg of water or 10...
Ch. 2 - What is the net force on a box that is being...Ch. 2 - What two quantities are necessary to determine a...Ch. 2 - What is the name given to a force that occurs in a...Ch. 2 - How much rope tension holds a 20-N bag of apples...Ch. 2 - What is the meaning of F=0?Ch. 2 - What test tells us whether or not a moving object...Ch. 2 - One bowling ball sits at rest and another rolls at...Ch. 2 - Why is the support force on an object often called...Ch. 2 - When you weigh yourself, how does the support...Ch. 2 - How does the direction of a friction force compare...Ch. 2 - If you push on a heavy crate to the right and it...Ch. 2 - Suppose you push on a heavy crate, but not hard...Ch. 2 - What equation shows the relationship among speed,...Ch. 2 - Why do we say that velocity is a vector and speed...Ch. 2 - Does the speedometer on a vehicle show the average...Ch. 2 - How can you be at rest and also moving at 100,000...Ch. 2 - What equation shows the relationship among...Ch. 2 - What is the acceleration of an object in free fall...Ch. 2 - Why does the unit of time appear twice in the...Ch. 2 - When you toss a ball upward, by how much does its...Ch. 2 - Joints are places where bones meet. Many of them,...Ch. 2 - In what way does friction affect an earthquake?Ch. 2 - When during a standing jump is your speed zero?Ch. 2 - What is the record-breaking height for a standing...Ch. 2 - What are some anatomical features that affect an...Ch. 2 - Show that the average speed of a rabbit that runs...Ch. 2 - Calculate your average walking speed when you step...Ch. 2 - Show that the acceleration of a hamster is 5m/s2...Ch. 2 - Show that the acceleration of a car that can go...Ch. 2 - Show that the acceleration of a rock that reaches...Ch. 2 - Show that Careless Cary who slips from the rung of...Ch. 2 - Show that a basketball player who jumps vertically...Ch. 2 - The weights of Burl, Paul, and the scaffold...Ch. 2 - Rank the net forces on the block from greatest to...Ch. 2 - Different materials, A, B, C, and D, rest on a...Ch. 2 - Three pucks, A, B, and C, are sliding across ice...Ch. 2 - Find the strength of the net force on a crate that...Ch. 2 - Lucy Lightfoot stands with one foot on one...Ch. 2 - A ball is thrown straight up with an initial speed...Ch. 2 - The sketch shows a painters scaffold in mechanical...Ch. 2 - A different scaffold that weighs 400 N supports...Ch. 2 - A vehicle changes its velocity from 90km/h to a...Ch. 2 - Extend Table 2.2 which gives values from 0 to 5 s...Ch. 2 - An airplane starting from rest on a runway...Ch. 2 - Knowledge can be gained by philosophical logic and...Ch. 2 - Which of Aristotles ideas did Galileo discredit...Ch. 2 - Your friend says that a ball rolling down a flat...Ch. 2 - A ball at the end of a string makes a pendulum. If...Ch. 2 - Which has more mass, a 2-kg fluffy pillow or a...Ch. 2 - Gravitational force on the Moon is merely 1/6 that...Ch. 2 - A monkey hangs stationary at the end of a vertical...Ch. 2 - Suppose the monkey weighs 100 N and the vine...Ch. 2 - Nellie hangs suspended at rest from the ends of...Ch. 2 - Nellie Newton stands at rest on a bathroom scale....Ch. 2 - Can a basketball player halfway through a jump in...Ch. 2 - Little Hudson as shown in the opening photo of...Ch. 2 - An empty 50-N jug rests on a table. What is the...Ch. 2 - A book that weighs 15 N is at rest on a table. How...Ch. 2 - The falling speedometer of Figure 2.24 shows...Ch. 2 - In Figure 2.13, we see Marie pushing horizontally...Ch. 2 - Suppose that a free-falling object were somehow...Ch. 2 - For a free-falling object dropped from rest, what...Ch. 2 - What is the acceleration of a car that moves at a...Ch. 2 - Correct your friend who says, Japans bullet trains...Ch. 2 - An airplane flies horizontally at a constant...Ch. 2 - You toss a coin vertically upward in the air....Ch. 2 - Does a person on a diet more accurately lose mass...Ch. 2 - Gracie says acceleration is how fast you go. Alex...Ch. 2 - Your friend says that a ball in free fall...Ch. 2 - Harry the painter swings year after year from his...Ch. 2 - When a ballplayer throws a ball straight up, by...Ch. 2 - Someone standing on the edge of a cliff as in...Ch. 2 - For a freely falling object dropped from rest,...Ch. 2 - Two balls, A and B, are released simultaneously...Ch. 2 - According to Galileo, inertia is a a force like...Ch. 2 - An object with a very small mass must also have a...Ch. 2 - The equilibrium rule F=0 applies to a objects or...Ch. 2 - A man weighing 800 N stands at rest on two...Ch. 2 - If an object moves along a straight-line path at...Ch. 2 - What is the net force on a box of chocolates when...Ch. 2 - Neglecting air resistance, when you toss a rock...Ch. 2 - During each second of free fall, the speed of an...Ch. 2 - A freely falling object has a speed of 40 m/s at...Ch. 2 - The vertical height attained by a basketball...
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