Forces

Question 1

What do forces produce changes in

Answer 1

• size
• shape
• motion
  Of an object

Question 2

Friction

Answer 2

Force between two surfaces that may impede relative motion and produce heating

Question 3

Does friction act on objects in gas and liquid

Answer 3

Yes
E.g air resistance

Question 4

What happens to an object when there is no resultant force acting on it

Answer 4

Either remains at rest or continues in a straight line at a constant speed

Question 5

Force equation

Answer 5

F=m*a

F is force (newtons - N)
M= mass kg
A = acceleration m/s^2

Question 6

How are resultant force and acceleration related

Answer 6

They are in the same direction

Question 7

Spring constant

Answer 7

Force per unit extension

Question 8

Hooke’s law/ spring extension equation

Answer 8

k = F/x

F = Force applied (in Newtons, N)
x = Extension or compression of the spring (in meters, m)
k = Spring constant (in Newtons per meter, N/m)

Question 9

Limit of proportionality definition

Answer 9

the maximum point up to which a material obeys Hooke’s Law — where the force and extension are directly proportional.