Equation
How do you determine the time spent in free fall mathematically?
√[(2* displacement Y)/ acceleration]
Projectiles are objects that are thrown in the air and are what?
Are subject to gravity
What does UAM stand for?
Uniformly Accelerated Motion
What is the definition of Free falling?
The acceleration on an object in free is called the acceleration due to gravity or free-fall acceleration
What is an example of a vector?
Displacement,velocity, acceleration
When velocity changes by the same amount during each time interval what does that say about acceleration?
Acceleration is Constant
projectile motion is ______ with ________
free fall with an initial horizontal velocity
What is the difference between free fall and projectile motion?
Projectile motion has an initial horizontal velocity, while free fall does not
Without air resistance, free-falling objects fall at a rate of how many meters per second?
9.81 m/s2 down
A vector contains what two things?
Magnitude and Direction
how would you calculate the final velocity if given the initial velocity, acceleration and change in time?
vf=vi+aΔt
What is the difference between Kinematics and kinetics?
kinematics is the study of description of motion
kinetics is the explanation of the motion.
The moment an object reaches the peak of its trajectory, what is its velocity?
Velocity: 0m/s
An object is dropped and touches the ground after 8 seconds. Assuming air resistance is negligible and the object is in free fall, how high up was the object dropped from. Round to the hundredth
.5(-9.81)*82 = -313.92.
Dropped from 313.92 meters up
What is “resultant displacement”?
The sum of two or more vectors
How do you determine distance fallen after free fall?
.5a(displacement of time)2
In this class what is the state of horizontal velocity when doing problems?
Horizontal velocity should be constant.
What is Projectile Motion?
Projectile motion is the curved path that an object follows when thrown, launched, or otherwise projected near the surface of earth
An object shot forwards at 10 m/ss, disregarding air resistance, will fall at a rate of what
9.81 m/s2 down
A mouse moves east 10 meters, north 8 meters, and west 4 meters. What is its total displacement?
√(10-4)^2 + (8)^2] = 10 meters NE
If you are given the initial velocity, final velocity, and change in time what equation would you use to find the displacement(Δx)?
Δx=1/2(vi+vf)Δt
How does one determine the displacement ,velocity, and acceleration of a projectile at any point in time during its flight
(1.Resolve vectors into components 2. Apply the simpler one-dimensional forms of the equations of each component. 3. Recombine the components to determine the resultant
Using SohCahToa, find the horizontal displacement of a boulder that was moved 5 meters NW at a 20-degree angle
5m * Cos(20) = 4.7m W
An object in free fall fell 653 meters down on earth. How long did it take for it to reach the ground? Round to the hundredth
√([2*-653]/-9.81) = 11.54 seconds
A red car drives 5 meters north, then 12 meters east. A blue car moves 20 meters northeast at a 30-degree angle. Find the resultant for both cars combined and the total vertical displacement of both cars
Resultant = 33 meters NE
V Displacement = 22 Meters E