True or false 1.Using a machine increases the amount of work that is done for a given amount of force. .

2. A machine increases the applied force by increasing the distance over which the force is applied. .

3. The force you apply to a doorknob is less than the force applied by the doorknob to open the door. .

4. All machines that change the strength of the force also change the distance over which the force is applied. .

5. The actual mechanical advantage of a machine is always greater than its ideal mechanical advantage. .

6. If a machine’s output distance is greater than the input distance, the ideal mechanical advantage is less than 1 .

7. If a machine changes only the direction of force, its mechanical advantage is equal to one. .

8. A lever is a machine that changes the direction of the force that is applied to it. .

9. The force applied by a machine is always greater than the force applied to the machine. .