P456

Question 1

Resultant force is …

A) The sum of all individual forces acting on an object
B) A new battle ship
C) The sum of forces acting on two objects

Answer 1

A

Question 2

Speed =

Answer 2

D/t

Question 3

Force =

A) m x a
B) change in momentum/t
C) A power the Jedi wield
D) all of the above

Answer 3

D

Question 4

Friction is…

Answer 4

A contact force that resists movement

Question 5

Why do cars have seat belts?

Answer 5

They slow down the impact time. This means the driver experiences a reduced impact force.

Question 6

Positive and negative charges attract.

True or false?

Answer 6

T

Question 7

Protons carry charge in electricity.

True or false

Answer 7

False (electrons do)

Question 8

Why are metals good conductors?

A) They went to music school
B) They have many free electrons
C) They have many free neutrons

Answer 8

B

Question 9

Why do resistors get hot?

Answer 9

Electrons collide with cations within the metal.

Question 10

Describe Ohms law

Answer 10

Ohms law describes the relationship between voltage, current and resistance such that
V= I R