Balanced Forces

Question 1

What is the Acceleration due to gravity?

Answer 1

The acceleration that a body in free fall experiences if air resistance and other forces are neglected
Symbol: g

Question 2

What is the Acceleration due to gravity on Earth and the moon?

Answer 2

Earth: 9.8 ms-2
Moon: 1.6 ms-2

Question 3

What is weight?

Answer 3

The downward force that the Earth exerts on the body due to its mass

Question 4

What is the equation for weight?

Answer 4

W = mg

Question 5

What is static equilibrium and when does is occur?

Answer 5

It’s when an object remains at rest

Occurs when an object is still and the net force acting on it is zero (not zero object accelerates)

Question 6

What needs to be taken into account when deciding whether a system is in equilibrium?

Answer 6

friction

Question 7

What is maximal friction force proportionate to?

Answer 7

Normal contact force

Question 8

What is the Coefficient of Friction?

Answer 8

The constant proportionality for any two given surfaces

Symbol: u (micro symbol)

Question 9

What is the equation for the Coefficient of Friction?

Answer 9

Fmax = uR
u = Coefficient if Friction
R = normal contact force

Question 10

What is the value of u for rough and smooth surfaces?

Answer 10

Rough = closer to 1
Smooth = closer to 0