Kinematics Part 1 Flashcards
Simple projectile motion will occur when an object does what 2 concepts.
- The object is in the air.
2. That object is experiencing only the force of gravity.
What are some common examples of projectile motion?
Thrown Balls
Flying Bullets
Falling Rocks
What are the 2 characteristics of projectile motion?
- The horizontal component of velocity doesn’t change.
2. The vertical acceleration due to gravity affects the vertical component of velocity.
Objects in projectile motion only experienced acceleration in the Y direction (vertical). Why?
Because gravity only acts downwards.
Does the horizontal component of an object’s velocity change in flight?
No.
How does Gravity impose an acceleration downward on projectiles?
Hint: 2 formulas g=
G =
9.8 (m/s^2)
Or
32 (ft/s^2)
What is the formula for vertical velocity?
Vertical Velocity = original vertical velocity - g × time
Are there three points of particular interest in a projectile’s flight?
Yes
The first particular interest in a projectile’s flight is..
Beginning of a flight, the object has a horizontal component and a vertical component giving it a large speed.
The second point of interest in an object’s flight.
Top of a projectile’s flight, vertical velocity equals zero.
The top is the slowest part of travel.
The 3rd point of interest.
When the object passes the same height as the launch, the vertical velocity is opposite of the initial vertical velocity which makes the speed equal to initial speed.
If the object continues to fall below the initial height from which it was launched, it will have an even greater velocity than it did initially from that point it hits the ground.
True
For the study of motion in rotation, when will a point have a greater linear speed?
When it is farther from the center of rotation.
Using degrees, what is the equation for linear speed?
Linear speed = (rotational speed [in degrees]) × (Pi radians/180 degrees) × (radius)
