Forces

Question 1

Forces definition

Answer 1

Α push, pull, or twist that causes α change in motion in an object.

• always have α direction
• can change direction of an object
• can change shape of an object
• measured in Newtons (N)

Question 2

Magnitude

Answer 2

The measurement for size of force

Question 3

Contact forces

Answer 3

• frictional force
• tension
• compression

Question 4

Non-contact forces

Answer 4

(field forces)

• magnetic
• gravitational
• electrostatic

Question 5

Spring balance types

Answer 5

• compression spring balance: force indicator will get greater with α greater pushing force
• (string?) spring balance: string attached to pointer will indicate amount of force exerted on spring

Question 6

Gravity

Answer 6

The force that attracts objects to the center of the earth
-mass: measurement of amount of matter in α body (g)
-weight: amount of gravitational force exerted on α body (N)
x(N) = y(kg) x 10

Question 7

Friction

Answer 7

When α material comes in contact against another

- useful when walking and using brakes
- constant fiction causes heat

Question 8

Magnetism

Answer 8

The force exerted by magnets

- magnets have north and south poles
- like poles attract, unlike poles repulse

Question 9

Pressure

Answer 9

Amount of force per area

- Pressure (N/m²)
- smaller area + greater force = greater pressure

Question 10

Net forces

Answer 10

(Fnet)
The sum of all forces acting on α body in different directions
-forces in the same direction get added together, forces in the opposite direction get subtracted from each other

Question 11

Electromagnetism

Answer 11

When electricity is transferred into α metal, it can transform into α magnet
-induction: α changing magnetic field induces αn electric current in α wire