If a person starts far ahead of you in a race, they will probably win because

1.   ?    you have an advantage.
2.   ?    they are faster.
3.   ?    they have an advantage.

A mechanical advantage means the machine

1.   ?    makes no difference.
2.   ?    makes your job harder.
3.   ?    makes your job easier.

Which of the following would give you a mechanical advantage?

1.   ?    A vacuum cleaner to pick up pieces of paper.
2.   ?    A block of wood to sit on.
3.   ?    A glove to pull hot objects out of an oven.

Which of the following would be the easiest way to get to the top of a tall hill? (Which would require the least amount of effort?)

1.   ?    Climb a very steep path.
2.   ?    Climb a very long, gradual path.
3.   ?    Climb a ladder almost straight up a cliff.

Which of the following is NOT an example of a mechanical advantage?

1.   ?    Climbing stairs to make it easier to get to the second floor.
2.   ?    A person lifts a large box up into a truck.
3.   ?    Using a wheelbarrow to carry a large load of bricks.
4.   ?    Using a long lever to pick up a large rock.

You push with 10 N onto a lever. The lever allows you to lift a 50 N rock. The lever

1.   ?    decreases your force.
2.   ?    increases your force.
3.   ?    has no effect on your force.

If you pull with 100 N to lift a 20 N box up into the air. The pulley system

1.   ?    increases your force.
2.   ?    has no effect on your force.
3.   ?    decreases your force.

If you are lifting a 30 N box. You have to push down 30 N on the other side of a lever. The lever

1.   ?    has no effect on your force.
2.   ?    increases your force.
3.   ?    decreases your force.

A simple machine with an MA = 1

1.   ?    decreases force.
2.   ?    doesn't change force.
3.   ?    increases force.

A simple machine with an MA of 3

1.   ?    increases force.
2.   ?    doesn't change force.
3.   ?    decreases force.

A simple machine with an MA of 0.25

1.   ?    decreases force.
2.   ?    increases force.
3.   ?    doesn't change force.

A simple machine with an MA greater than 1

1.   ?    doesn't change force.
2.   ?    increases force.
3.   ?    decreases force.

A simple machine with an MA less than 1

1.   ?    increases force.
2.   ?    decreases force.
3.   ?    doesn't change force.

A simple machine with an MA equal to 1

1.   ?    doesn't change force.
2.   ?    decreases force.
3.   ?    increases force.