Flashcards in Physics Deck (13):

1

## What is Newton's first law?

###
if Fnet=0, a=0

"Law of Inertia"

can be not moving, or moving at constant velocity

2

## What is Newton's second law?

### Fnet=ma

3

## What is a Newton?

###
measurement of force

(m/s^2)(kg) = N

4

## What is Newton's third law?

###
"action-reaction" pair

for every action there is an equal and opposite reaction

**Remember: the forces act on DIFFERENT objects

5

## What is Newton's law of gravitation?

###
every object of some mass can create a force of gravity

also called the "Inverse Square Law"

remember that the radius needs to be measured from the centre of the masses

6

## In which direction is torque positive?

### counterclockwise

7

## In which direction is torque negative?

### clockwise

8

## What is translational equilibrium?

### Fnet = 0

9

## What is rotational equilibrium?

### torque net = 0

10

## What is static equilibrium?

###
Fnet = 0

torque = 0

v = 0

11

## What is rotational inertia? What objects will have more rotational inertia?

###
objects will resist rotation

objects with mass further from centre of mass will have a higher rotational inertia

12

## Will you always hit a falling target if you aim for the right spot?

### yes because they will have the same acceleration despite their masses

13