| Kinematics | Dynamics | Energy | Momentum | Torque and Rotational Motion |
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What is difference between speed and Velocity?
Speed is a scalar which has a magnitude and a distance while velocity is a vector and has a magnitude and a distance with a specific direction.
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What is Inertia?
Inertia is the tendency of an object to resist a change in a state of motion?
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What is the Unit for energy?
Joules: J
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What is the equation for Momentum?
p = mv
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What is Rotational Motion?
When an object spins about a fixed axis.
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What is the equation for Velocity?
V=ΘP/θT
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What is Newton’s second law?
Sum of the forces= Objects Mass x Objects acceleration?
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What is an LOL diagram?
A way to illustrate how energy changes throughout a scenario, all qualitative/no numbers.
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What are the two types of momentum?
Linear
Angular |
If a speed-o-meter measures linear velocity in a car, what measures the angular velocity?
RPMs
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What is the Kinematic equation regarding final position?
Xf = X0 + V0t + 1/2At^2
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What are the Three different systems and why are they different?
Open= Mass and energy move freely through
Closed= Only energy is able to freely move through Isolated= Neither Energy or Mass can flow through |
What is Work done on a system?
The energy transferred to or from an object via the application of force along a displacement.
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What is Impulse?
A force applied over a duration of time
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What is torque?
Force that causes an object to rotate.
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A cannon shoots a cannon ball off a cliff a distance y above the ground, describe the velocity vs time graph of the x and y motion of the cannon ball as it falls.
The x graph should be a constant velocity in the positive x direction due to negligible air resistance, the y will be a downward concave graph heading to -y.
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What is the equation for Hooke’s Law/Spring Force?
Fs = -kx
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Describe the Conservation of mechanical energy.
energy can neither be created nor be destroyed; it can only be internally converted from one form to another if the forces doing work on the system are conserved.
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What is the momentum difference of a car moving at 70 m/s with a mass of 1500kg with people vs moving at 20 m/s with a empty car mass of 650 kg?
Car 1= 105,000 Kgm/s
Car 2= 13,000 Kgm/s Difference= 92,000 Kgm/s |
What is special about rotational inertia when looking at mass?
The distribution of mass in an object changes the rotational inertia as mass may or may not be even.
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What is the angle of decline of the cannon ball at Vy=-30m and Vx=8m?
tan^-1=(-30m/8m)
The angle is ~-75.1 degrees |
What are the 5 steps to making a free body diagram?
1- Draw Free body Diagram 2- Break forces into components 3- Redraw free body diagram 4- Use Newtons 2nd law to sum forces 5- sum forces perpendicular to question 4
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What is the Kinetic energy of a ball being pushed at 30 m/s and a mass of 12 kg?
5400 Joules
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Is Momentum considered a force or energy?
Neither, it is its own thing
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What are the three kinematic equations in angular form?
Θf = θi+ ω0t + 1/2αt^2
ωf = ωi+ αt ωf^2 = ωi^2 + 2αΔθ |
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