Question 22

Question

Taylor says he likes using simple machines because they do his work for him. Alicia says that simple machines only help do the work, but do not do the work for you. Which best describes who is correct?

a
Alicia is correct because simple machines change the amount of work required, but still require work.
b
Taylor is correct because simple machines are always used in factories and don't require work.
c
Taylor is correct because simple machines are always used without anyone touching them.
d
Alicia is correct because simple machines use electricity to help perform jobs.

Answer 1

a
Alicia is correct because simple machines change the amount of work required, but still require work.

Answer 2

Question 23
Which force accounts for the difference between mass and weight?

a
Frictional force
b
Gravitational force
c
Magnetic force
d
Air resistance force

Answer 3

b
Gravitational force