In a first class lever, what is in the middle?

1.   ?    Input Force
2.   ?    Output Force
3.   ?    Fulcrum

In a second class lever, what is in the middle?

1.   ?    Input Force
2.   ?    Output Force
3.   ?    Fulcrum

In a third class lever, what is in the middle?

1.   ?    Input Force
2.   ?    Output Force
3.   ?    Fulcrum

Which class of lever is shown?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class

Which class of lever is shown?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class

Which class of lever is shown?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class

Which class of lever is shown?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class

Which class of lever is shown (You push in the middle and the staple comes out at the end)?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class

Which class of lever is shown?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class

Which class of lever is shown (output is cracking the nuts in the "teeth")?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class

Which class of lever is shown (in this case your hand moves the shovel from the middle of the wood handle and the hand at the grip doesn't move)?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class

Which class of lever is shown (in this case your hand doesn't move in the middle, but your hand on the grip does)?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class

Which class of lever is shown?

1.   ?    First Class
2.   ?    Second Class
3.   ?    Third Class