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Hookes review

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Question 1

20 pts

A student pulls a cart across the floor with a force of 62 N. If
the cart travels 65 m, how much work does the cart do on the
student? Please do not include units or the answer will be marked
incorrect.

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Question 2

20 pts

Object A has a mass of m with a speed of v. Object B has a mass of
m and a velocity of 2v. Compared to the kinetic energy of Object A,
the kinetic energy of Object B is

Group of answer choices

4 times larger

1/2 as large

1/4 as large

2 times larger

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Question 3

20 pts

A rocket launcher has a spring constant of 214 N/m. What force is
required to stretch the spring a distance of 6 m? You must show
work to earn credit for your answer.

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Question 4

20 pts

An 845 N sled is pulled a distance of 185 m. The task is done by
pulling on a rope with a force of 125 N at an angle of 59° with the
horizontal.

• How much work is done in pulling the sled?

• What is the acceleration in the x direction, assuming that
friction is negligible?

• Assuming the sled started at rest, how long does it take to pull
the sled 185 m?

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Question 5

19 pts

A 43 kg child slides down a playground slide that is 3.2 m
high.

What is the child's velocity as she hits the ground?

Create an LOL chart to represent this problem and then solve the
problem.

All work must be shown to receive credit.

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Attempt due: Mar 27 at 11:59pm

Answer #1

answer all 10 questions
answer all questions
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Question 4
10 pts
A rocket launcher has a spring constant of 783 N/m. What force is
required to stretch the spring a distance of 2 m? You must show
work to earn credit for your answer.
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Question 5
10 pts
A spring has a spring constant of 96 N/m. How much work is done
when the spring stretches...

Do all five questions
Question 1
20 pts
Ignoring the effects of air resistance, if a ball falls freely
toward the ground, its total mechanical energy
Group of answer choices
increases
remains the same
not enough information
decreases
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Question 2
20 pts
A child jumps off a wall from an initial height of 16.4 m and
lands on a trampoline. Before the child springs back up into the
air the trampoline compresses 1.8 meters. The spring constant...

4.15.9 Lesson: Power Assessment
Started: Dec 3 at 5:23am
Power Assessment
Please complete the following questions based on the previous
lesson completed.
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Question 1
12 pts
How much power does a motor have that can lift a 155.0 kg mass to a
height of 4.0 m in 55 seconds? Please show your work to earn credit
for this question.
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12pt
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0 words
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Question 2
12 pts
A tractor pulls a...

do all five questions
Question 1
20 pts
Ignoring the effects of air resistance, if a ball falls freely
toward the ground, its total mechanical energy
Group of answer choices
increases
remains the same
not enough information
decreases
Flag this Question
Question 2
20 pts
A child jumps off a wall from an initial height of 16.4 m and lands
on a trampoline. Before the child springs back up into the air the
trampoline compresses 1.8 meters. The spring constant...

(a) A constant 20 N force pushes a small ball in the direction
of the force over a distance of 5.0 m. What is the work done by the
force?
(b) A toy cart is pulled a distance of 6.0 m in a straight line
across the floor. The force pulling the cart has a magnitude of 20
N and is directed at 37° above the horizontal. What is the work
done by this force?
(c) A sled plus passenger...

8 through 10 done please!!
3.13.6
Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
35,494 J of potential energy, how many meters above ground is the
car? Report your answer to 1 decimal place. Please do not include
units or the answer will be marked incorrect.
Flag this Question
Question 210 pts
A box sitting on the top of a hill has 252 J of potential energy.
If the hill is...

answer all questions
3.13.6
Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
35,494 J of potential energy, how many meters above ground is the
car? Report your answer to 1 decimal place. Please do not include
units or the answer will be marked incorrect.
Flag this Question
Question 210 pts
A box sitting on the top of a hill has 252 J of potential energy.
If the hill is 279 meters...

just do questions 5 through 10
3.13.6
Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
35,494 J of potential energy, how many meters above ground is the
car? Report your answer to 1 decimal place. Please do not include
units or the answer will be marked incorrect.
Flag this Question
Question 210 pts
A box sitting on the top of a hill has 252 J of potential energy.
If the hill...

Question 1:
A 2-kg wood block is pulled by a string across a rough
horizontal floor. The string exerts a tension force of 30 N on the
block at an angle of 20º above the horizontal. The block moves at
constant speed. If the block is pulled for a distance of 3.0 m, how
much work is done by the tension force?
Question 2:
Part A: A spring-loaded toy gun is used to launch a 12.0-g
plastic ball. The spring...

question 1: Let A be the last digit, let B be the second to last
digit, and let C be the sum of the last three digits of your
8-digit student ID. Example: for 20245347, A = 7, B = 4, and C =
14.
Starting from rest, a student pulls a (25.0+A) kg box a distance
of (4.50 + B) m across the floor using a (134 + C) N force applied
at 35.0 degrees above horizontal. The coefficient...

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