Falling Balls

Question 0

Excluding air resistance, how differently do different ballad fall?

Answer 0

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.

Question 1

Weight?

Answer 1

The downward force exerted on an object by Earth’s gravity.

All weight due earths gravity.

Question 2

Newton’s 2nd Law (Falling)

Answer 2

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

Question 3

1m/s^2=?

Answer 3

1N/Kg, same unit.

Question 4

Weight/gravity object/ kg•mass depends on (2)?

Answer 4

1. Mass of object producing gravitational force

2. Distance from object (Earth, moon)

Question 5

X is constant and Y depends on gravity, what are X & Y?

Answer 5

X= mass, regardless gravity 
Y= weight, depends on gravity

Question 6

Want motion need?

Answer 6

External force, velocity (acceleration & direction) retains, unless again externally acted (push/pulled) on.

Question 7

When ball thrown up in air, after released from hand x gradually decreases its’ rate.

Answer 7

X= velocity

Question 8

When ball thrown up in air, after released from hand x gradually increases, plateaus & decreases.

Answer 8

X= position

Question 9

Acceleration (Falling) = ?

Answer 9

G (gravity)

Question 10

Velocity (Falling)=?

Answer 10

G (acceleration)•time

Question 11

Position= ?

Answer 11

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

Question 12

Average Velocity =?

Answer 12

G•Time/2

Question 13

position of falling ball =?

Answer 13

Position= g•time^2/2
& .•.

Position = initial position+ initial velocity• time + g•time^2/2

Question 14

Velocity of Falling ball=?

Answer 14

Velocity= initial velocity+ (velocity) g•time

Question 15

Position of ball at any moment during fall =?

Answer 15

Any position falling ball = initial ball position (where let go of) + balls’ initial velocity•time + 1/2 (downward acceleration)• g• time^2

Question 16

Falling balls motion (2)?

Answer 16

A) Vertical falling motion
B) Downfield Coasting Motion

Done simultaneously but have no effect on each other

Question 17

Optimal 3 directions describe motion falling ball?

Answer 17

1) Point Straight Up
2) point horizontally (along balls path taken)
3) points to the side (doesn’t matter direction as long as different from preceding.)

Question 18

Direction of ball thrown straight up/tossed from rest?

Answer 18

All motion along vertical axis/direction