Calculating Speed, Velocity, and Acceleration
Speed- How Fast
Velocity - How Fast with direction
Acceleration - Change in velocity over time
On velocity and position graphs what is always on the x axis?
Time
What's a Force?
A push or a pull
What is net force? How do we calculate it?
The sum of all forces acting on an object. Add up all of the forces acting on an object.
Disturbances that transfer energy through a space or medium
What are the formulas for Speed, Velocity, and Acceleration?
Speed = Distance/Time
Velocity = Displacement/ Time
Acceleration = (vf-vi)/time
On a position v time, what does the slope represent? Explain your thought process.
Velocity, becuase V = displacement/time and displacement is a change in position. On the y axis, there is a change of position or displacement (rise) and the run is time so the slope = Velocity
Restate in your own words Newton's 1st, 2nd, and 3rd Laws of motion.
1st - an object in motion stays in motion until an unbalanced force acts upon it
2 - Force =MA
3. For every action there is an equal and opposite reaction.
How do we represent the magnitude of a force in force diagrams?
Through the size or length of an arrow
What are 3 examples of waves?
Sound Waves
Light
Xrays
Gamma Rays
Radio waves
A car travels 500m south in 5s? What's the velocity of the car
100m/s SOUTH
Acceleration, because A = (change in velocity)/time, and the slope would be a change in velocity (rise) over time(run), thus Slope = Acceleration
Describe how Balanced and Unbalanced forces affect an object's motion.
Balanced forces do not affect an object's motion.Unbalanced forces can accelerate, decelerate, or change the direction of an object.
When do we add, when using force diagrams? What about subtracting
Add when arrows are in the same direction
Subtract when arrows are in the opposite direction
Define the parts of a wave.
Crest
Trough
Amplitude
Wavelength
Crest - Wave's Highest Point
Trough - Wave's Lowest Point
Amplitude - The distance from the rest area to crest OR trough
Wavelength - Distance from crest to crest or trough to trough
What are the units for acceleration?
distance/time2 (m/s2)
What would the slope equal if an object is moving at a constant speed on a velocity v time graph?
A flat line that is not at zero
What is inertia? Which of newton's laws does it tie to?
Inertia - an object's resistance to its change in motion
It is closely tied to Newton's 1st Law
What is the name of the supportive force that often counteracts gravitational forces that is acting on an object?
Normal Force
How is amplitude, wavelength, and frequency related to a waves energy?
Amplitude - directly proportional
Wavelength- Inversely Related
Frequency - Directly proportional
A car is parked and accelerates at a rate of 5 m/s2 in 10s. What is the car's final velocity?
50m
On a velocity v time graph, what sign does slope have if an object is decelerating
Negative
What two things determine an object's force
Its mass and acceleration
What is the force that a rope acts upon an object when supporting an object?
Tension
What are 3 applications of waves?
Wifi
Microwaves
Healthcare technology
Glasses