Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
Earth exerts a gravitational force on objects that is ______.
|
Attractive (towards the earth's surface).
|
|
|
Near the earth's surface, the force produces a constant _____.
|
Downward acceleration
|
|
|
Gravitational acceleration is _____.
|
Uniform, or constant with time.
|
|
|
What is the equation for a falling object on earth?
|
d=1/2(a)(t^2)
|
|
|
What about a situation where a ball is thrown to the ground? What are three important differences to note?
|
It will have a starting velocity different from zero, it will reach the ground more rapidly, it will have a larger velocity when it hits the ground.
|
|
|
What is the equation for an object thrown (as opposed to dropped) off of a roof?
|
v=v(velocity of the object when thrown)+at
d=v(velocity of object when thrown) + 1/2 (a)(t^2) |
|
|
What about a ball thrown upward? What are two important differences to note?
|
The acceleration is in the opposite direction to the upward velocity.
|
|
|
In an example of a ball thrown upward at a rate of 20 m/s, what would the downward acceleration (due to gravity) be? Every second, the the velocity would decrease by _____
|
10 m/s. (Ten m/s is one half of the acceleration). 10 m/s.
|
|
|
In terms of projectile motion, the path that a moving object follows is called a _____.
|
Trajectory
|
|
|
Projectile motion involves the trajectories of objects that have been _________.
|
Launched, shot, or thrown.
|
|
|
In terms of a projectile object, with absence of air resistance, the acceleration of the horizontal motion is _____.
|
Zero
|
|
|
A projectile object moves with _____.
|
Constant horizontal velocity.
|
|
|
A projectile object travels equal _____ with equal _____.
|
Horizontal distances, time intervals.
|
|
|
In a projectile object, the acceleration of the vertical motion is _____.
|
Constant.
|
|
|
In a projectile object, the vertical velocity increases ______ just like a ____.
|
Downward, falling object.
|
|
|
In a projectile object, in each successive interval, it falls a ________ than the previous insterval.
|
Greater distance.
|
|
|
The total velocity at any point is found by adding the _____ to the _____
|
Vertical component of the velocity, at that point, to the horizontal component of the velocity, at that point.
|
|
|
In a projectile object, the horizontal velocity remains ____ because ____.
|
Constant, there is no acceleration in that direction
|
