Weight and terminal velocity Flashcards Preview

GCSE Physics: Topic 10 > Weight and terminal velocity > Flashcards

Flashcards in Weight and terminal velocity Deck (12):
1

What is mass of an object?

Quantity of matter in it

2

What happens if object falls freely?

Resultant force acting on it is force of gravity

3

What will happen to object falling freely

when resultant force acting on it is gravity

Force will make object accelerate about 10 (m/s)2

towards Earth's surface

4

What is an object's weight?

Force of gravity that acts on object

5

What is acceleration due to gravity?

Acceleration , which object experiences due to gravity

6

Equation of

force acting on an object is its weight

W = mg

W = weight , N

g = acceleration due to gravity - m/s2

m = mass , kg

7

What is gravitational field strength?

Gravitational force on a 1kg object at a place where the object is

8

What is units of gravitational field strength?

Newtons per kilogram

N/kg

9

What happens when object falls through a fluid

(like liquid or gas)?

Fluid exerts a drag force on the object

resisting its motion

10

What happens the faster the object falls through fluid?

Bigger the drag force becomes

until it becomes eventually equal to weight of object

11

What happens after object falls through fluid?

resultant force = 0

Object stops accelerating

moves at constant velocity - terminal velocity

12

What happens when object falling through the air?

Drag force is called air resistance