Simple Machines Worksheet
Cards (13)
- Ideal mechanical advantage is equal to the displacement of the effort force divided by the displacement of the load.
- To obtain the same resistance force, a greater force must be exerted in a machine of lower efficiency than in a machine of higher efficiency.
- Mechanical advantage is always greater than 1.
- What type of simple machine is most often used to cut things.
- What type of simple machine is a flight of stairs?
- Which is not a simple machine?
- Which is not a part of the walking mechanism of the human body?
- What type of simple machine is in a wheelbarrow?
- Machines make tasks easier by changing either the magnitude or the direction of the _____ needed.
- A wheel and axle with an ideal mechanical advantage of 6 is 67 percent efficient. What is the mechanical advantage of the wheel and axle?
- A seesaw is a lever. Suppose you use a seesaw to lift a bucket of sand. What is the ideal mechanical advantage of the seesaw if the efficiency of the seesaw is 67 percent, the effort force is 36N, and the resistance force is 144N?
- A lever's efficiency is 95 percent. The work in is 95J. What is the work out?
- You use a knife to cut into a block of cheese. Moving the knife 2.0 cm into the cheese separates the cheese 0.12 cm. Find the IMA for the knife.