forces: part 1

Question 1

Describe everyday situations where forces are balanced

Answer 1

balanced: riding a bike on a flat surface at a constant speed

Question 2

Describe everyday situations where forces are unbalanced.

Answer 2

unbalanced: when you stand still and someone pushes you the forces are unbalanced.

Question 3

Describe friction as a contact force.

Answer 3

friction creates a force by being rubbed together and contact for extert of forcce by touch

Question 4

what can friction be used for? (three examples)

Answer 4

1. lighting a match
2. sanding wood
3. walking on a contrete path

Question 5

Describe examples of ways to increase friction.

Answer 5

surfaces are rough and push against eachother hard.

Question 6

Describe examples of ways to decrease friction.

Answer 6

smooth surfaces

Question 7

Name 3 non-contact forces

Answer 7

1.Gravity
2. Electrostatic
3.Magnesium

Question 8

How is gravity a non-contact force?

Answer 8

gravity is a non-contact force that keeps objects from floating and also keeps the planets orbiting.

Question 9

define magnetic force as a noncontact force

Answer 9

magnetic forces exert a force by pulling one object to another with magnets.

Question 10

State the rules for attraction and repulsion of magnetic poles.

Answer 10

south + south = repel
north + north = repel
south + north = attract

Question 11

Describe the structure of an atom, using the terms protons, neutrons and electrons, to explain how objects acquire an electrostatic charge.

Answer 11

There is an equal amount of protons and neutrons in the center of the atom. The outer circles have either electrons or protons.

An object can gain or lose charge by being rubbed against certain objects.