3.7 Free Fall And G

Question 1

Define acceleration of free fall

Answer 1

The rate of change of velocity of an object falling in a gravitational field with the symbol g

Question 2

Define air resistance

Answer 2

The drag or resistive force experienced by objects moving through air

Question 3

Define drag force

Answer 3

The resistive force exerted by a fluid on an object moving through it

Question 4

Define free fall

Answer 4

The motion of an object accelerating under gravity with no other force acting on it

Question 5

Define terminal velocity

Answer 5

The constant speed reached by an object when the drag force/up thrust is equal and opposite to the weight of the object

Question 6

Define a uniform gravitational field

Answer 6

A gravitational field in which the field lines are parallel and the value for g remains constant

Question 7

Describe methods which can be use to determine the value of g

Question 8

Fill the gaps
Assuming there is no air resistance
The vertical velocity changes due to 1………… .. …. …
The 2…….. ………… and 3…. .. …… can be calculated using equations of motion
The 4……… ……. Remains constant

Answer 8

1. Acceleration of free fall
2. Vertical displacement
3. Time of flight
4. Horizontal velocity

Question 9

What do you call the curved path of a projectiles motion?

Answer 9

A parabolic path