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GENERAL PHYSICAL SCIENCE
ANSWER SHEET – POWER & MOMENTUM
(1/2 point each unless otherwise marked)
Group Members: Alyx, Bethany, and Tyyee
Date: 2-6-2024
Procedure #1: Power
(4 points for the table)
Data Table
Name
Trial
Weight
in lb (F)
Vertical height of steps in ft
(d)
Time required to scale the flight of steps in
seconds (t)
Work done W
= Fd
Units: (ft
∙
lb)
Power
P = W/t
Units: (ft
∙
lb)/s
Horsepower developed P
÷
550
Units: (hp)
Alyx Edwar
ds
Walking
120 lb
9.2 ft
5.64 s
1,104 J
195.7
J/s
0.35 hp
Alyx Edwar
ds
Running
120 lb
9.2 ft
3.11 s
1,104
J
354.9 J/s
0.64 hp
Betha
ny
Walking
165 lb
3 ft
3.5 s
495 ft
lb
141 ft
lb/s
0.26 hp
Betha
ny
Running
165 lb
3 ft
1.5 s
495 ft
lb
330 ft
lb/s
0.6 hp
Tyyee
Walking
150 lb
7.25 ft
8.12 s
1087.5
133.93
.24 hp
Tyyee
Running
150 lb
7.25 ft
4.57 s
1087.5
237.96
.43 hp
_
Walking
_
_
_
_
_
_
_
Running
_
_
_
_
_
_
Results
(1 point each)
1.
Explain why there is a difference in the horsepower developed in walking and running up the flight of stairs. Because you use more energy while running
up the stairs.
2.
Is there some limit to the height of the flight of stairs used and the horsepower developed? Yes, as you increase your speed you can burn more energy, but that can cause you to decrease in speed.
1 | Page
GENERAL PHYSICAL SCIENCE
ANSWER SHEET – POWER & MOMENTUM
3.
Could the horsepower developed by a slower-moving student ever be greater than the horsepower developed by a faster-moving student? Yes, they can lose their power at a faster rate because they are burning more energy, while the slower-moving student is saving energy. Procedure #2: Momentum
(1 point per column)
Velocity (Use the graphs to estimate the maximum velocity to the nearest 0.1)
Release Position
40 cm
60 cm
80 cm
Estimated
Velocity in m/s
Trial #1
1.4 m/s
1.7 m/s
1.9 m/s
Trial #2
1.6 m/s
1.8 m/s
1.8 m/s
Trial #3
1.6 m/s
1.7 m/s
1.9 m/s
PROCESSING THE DATA
1.
Release Position
40 cm
60 cm
80 cm
Show your work for calculating the average velocity
1.4 + 1.6 + 1.6=
4.6/3 =1.5 m/s
1.7 + 1.8 + 1.7=
5.2/3 = 1.7 m/s
1.9 + 1.8 + 1.9=
5.6/3= 1.9 m/s
Average velocity in m/s
1.5 m/s
1.7 m/s
1.9 m/s
2.
Release Position
40 cm
60 cm
80 cm
Show your work for calculating the car’s momentum
180.4 x 1.5 180.4 x 1.7
180.4 x 1.9
Momentum in g•m/s
270.6 m/s 306.7 m/s
342.8 m/s
3. 2 | Page
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Related Questions
TION 24
Steel ball with radius of 0.09 m lays on a bottom of the lake 5 m deep. What work is needed to lift the ball to the surface of
3.
the lake? Density of steel is 7860kg/m. The volume of a sphere is
Use g = 9.8 m/s< Calculate answer to two decimals.
%3D
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a. Change in potential energy
b. Change in kinetic energy
c. Change in kinematics
d. Change in kinetics
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hemisphere
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My answer was 855
This was my feedback
Please fix this
Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. J
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Answer
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Match each unit with the physics concept it represents.
force
а.
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с.
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е.
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Chapter 6, Section 66, Question 007
A spring enerts a farce of 24 N when e is sorenched 03m beyond its natural length. How much work is regured to seretch the spring 0.6 m beyond ts natural keng?
Enter the exact answer
exact umber, no tolerance
Click you would ke to Show Work for this questione Oeen Shanok
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OBJECTIVE:
Determine how physical work is related to the time to walk and hurry up a flight of stairs
Determine how weight is related to physical work
Determine how power is related to physical work
Determine how time is related to power.
INSTRUCTIONS:
Measure the vertical distance from the ground floor to the landing and from the landing to the 1st floor as shown below (convert to feet). Record this value on the data sheet, column B. Note: Your stairs might not have a landing – that’s ok. Just measure the vertical height from the bottom to the top of the stairs.
Record your weight (pounds) in column A of the data sheet. Multiply column A and column B. Record this value in column C.
Measure the time it takes to walk (at a normal pace) up the stairs from the ground floor to the first floor – use the hand rail for support. Measure 3 times and calculate the average time. Record these values in column D.
Measure the time it takes to briskly walk (not run) up the stairs…
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done.
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done.
3. Find the work done by a 2.0 kg load moved at a distance of 1 m horizontally.
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Calculate answer to one decimal.
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J
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01: Suppose a force F proportional to Energy; Velocity; and time. Find the formula of the
force equation using dimensional analysis.
02: chose the correct answer: (show your answer)
A. How much time will be required to perform 520 J of work at the rate of 0.027 hp?
(a) 24s
(c) 20 s (d) 26 s
(b) 16s
B. A students caries a bag weighing 11.025 lbm from the ground floor to his class
on the first floor that is 78.74 in high. The work done by the boy is
(a) 1 J
(c) 100 J (d) 1000 J
(b) 10 J
C. The potential energy of a system increases, if work is done
(a) by the system against a conservative force
(b) by the system against a non-conservative force
(c) upon the system by a conservative force
(d) upon the system by a non-conservative force
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Problem 2
A rectangular tank that is 88 feet long, 33 feet wide, and 1515 feet tall is filled with a liquid that has a density of p pounds per cubic foot. If a spout is connected to the top of the tank, how much work will it take to pump all of the liquid out of the tank through the spout?
Work= ____________ft-lb
How much work will it take to pump all of the liquid out of the tank through a spout that is T feet above the top of the tank?
Work= ____________ft-lb
Answers should be in terms of p and T.
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ACTIVITY 5
ODL STEM 12A
The energy consumed by a o.8okW electric drill is 45 kJ in
1.
_hour/s.
What is the speed of a 3.okg object when its kinetic energy is
5.0J? Express your answer in ft/s (feet/second)
2.
3.
What is the speed of the same object in #2 if the object has a
weight of o.225|b?
What is the ratio of energy consumption of a person who
moves minimally when his/her requirement in moving is 8 MJ of
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4.
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Please write clearly and understandable way.
Write all the corresponding Given with their corresponding symbols and units.
Draw/Illustrate the diagram/circuit or drawings that is related to the problem,
IF POSSIBLE, which is HIGHLY REQUIRED.
Solve in step-by-step, no shortcut.
Underline twice the Final Answer.
PROBLEM:
Find the work done against the force of gravity in moving a rocket
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A. 16000/7 mi-tons
B. 32000/21 mi-tons
C. 64000/21 mi-tons
D. 16000/21 mi-tons
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Your Answer:
Question 4 options:
Answer
units
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An object having a capability to do work is said to possess __________.
A) force
B) moment
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Related Questions
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