Gabriel Barillas, John Batch & Ana Lucia Jaime's Deck Flashcards
5 - “Remember” - Definitions
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What is definition of work?
Is the energy transferred to or from an object via the application of force along a displacement
What is a reference level?
The position where GPE is defined to be zero
What is the definition of motion?
The action or process of moving or being moved.
What is the definition of energy?
Power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.
What is the definition of gravitation?
The force that attracts a body toward the center of the earth, or toward any other physical body having mass.
5 - “Identify” - Questions
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What is the equation for kinetic energy?
1/2mv^2
What is the equation of moment inertia?
I = mr^2
What is the equation of speed?
S = d/t
What is the equation of force?
F = m * a
Which defines the lever arm?
The perpendicular distance from the axis of rotation to the point where the force is exerted.
5 - “Calculation Questions”
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An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.
s = ut + 1/2 at ^2
s = 1/2 at²
s=1/2(3.20)(32.8)²
s= 1720 m
What is the gravitational potential energy of a 3.0-kg rock that is 12.4 m above the ground?
PE = 3.0(-9.8)(-12.4)
PE = 360 J
A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a distance of 110 m. Determine the acceleration of the car.
u=0
t=5.21
s=110m
we know s=1/2at²
110=1/2 a(5.21)²
220/5.21²=a
a = 8.10 m/s
Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2.60 seconds, what will be his final velocity and how far will he fall?
= 9.8 m/s² × 2.60 s + 0 m/s
= 25.48 m/s + 0 m/s vf = 25.5 m/s
d = (Vf + Vi) / 2 × t
= 25.48 m/s / 2 × 2.60 s
d = 33.1 m
A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the acceleration of the car and the distance traveled.
u=18.5 m/s
v=46.1 m/s
t=2.47 secs
a=(v-u)/t
= (46.1-18.5)/ 2.47
a = 11.2 m/s
d = 79.8 m
5 - “Understand” Questions
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What is the ability of an object to produce a change in itself or the world around it?
Energy
Which energy is calculated by finding the product of one-half the mass and the square of the velocity?
Translational kinetic energy
Which energy is best associated with a stretched rubber band?
Elastic potential energy
Which is the rate at which energy is transformed?
Power
Which describes the transformation of energy as a ball is thrown up into the air and reaches its maximum height?
Kinetic energy changes to gravitational potential energy.
Which describes the process of doing work?
When work is done on the system, then W is positive, and the energy of the system increases.
Why would a star do no work on a planet that travels in uniform circular motion around it?
There is no force component parallel to the motion.
When is work done on a system?
When a force is applied through a displacement.
Which is a measure of how effectively a force causes rotation?
Torque
Which is the resistance to rotation?
Moment of inertia
Newton’s second law for rotational motion states that angular acceleration is:
Directly proportional to the net torque and inversely proportional to the moment of inertia.
According to Kepler’s first law, what do the orbits of the planets look like?
Ellipses
According to Kepler’s first law, what is at the focus of a planet’s orbit?
Sun
Which two factors is the gravitational force between two objects dependent upon?
Mass, distance
Which is a contact force?
Friction
