Falling Balls Flashcards
Excluding air resistance, how differently do different ballad fall?
Objects w/ more weight= more mass & More resistance to acceleration under motion.
.•. Balls with different masses would fall at same rate b/c weight= mass.
Weight?
The downward force exerted on an object by Earth’s gravity.
All weight due earths gravity.
Newton’s 2nd Law (Falling)
Acceleration= net force/mass
.•. Acceleration= weight/mass
Near earth surface
Weight= 9.8 N/Kg• mass
.•. Acceleration= 9.8N/Kg• mass (weight)/ mass
Mass cancels out
1m/s^2= 1N/Kg 9.8N/Kg= 9.8m/s^2
.•. Acceleration = 9.8m/s^2
1m/s^2=?
1N/Kg, same unit.
Weight/gravity object/ kg•mass depends on (2)?
- Mass of object producing gravitational force
2. Distance from object (Earth, moon)
X is constant and Y depends on gravity, what are X & Y?
X= mass, regardless gravity Y= weight, depends on gravity
Want motion need?
External force, velocity (acceleration & direction) retains, unless again externally acted (push/pulled) on.
When ball thrown up in air, after released from hand x gradually decreases its’ rate.
X= velocity
When ball thrown up in air, after released from hand x gradually increases, plateaus & decreases.
X= position
Acceleration (Falling) = ?
G (gravity)
Velocity (Falling)=?
G (acceleration)•time
Position= ?
Average velocity• time
Or
G•time/2 (given 2 polar points) • time
& .•.
Position= avg velocity•time
= g•time/2 • time
Time becomes squared
Position= g•time^2/2
Average Velocity =?
G•Time/2
position of falling ball =?
Position= g•time^2/2
& .•.
Position = initial position+ initial velocity• time + g•time^2/2
Velocity of Falling ball=?
Velocity= initial velocity+ (velocity) g•time
