Questions: Inclined Planes and Wedges

Question 1

Why is it easier to push a heavy box up a ramp than to lift it straight up?

• A. The ramp removes gravity
• B. The ramp spreads the effort over a longer distance so less force is needed
• C. The box weighs less on a ramp
• D. The ramp pushes the box up automatically

Answer: (B)

A ramp lets you use less force by spreading the effort over a longer distance. Gravity still pulls on the box the same amount.

Question 2

A wedge is made of two inclined planes joined together.

• T. True
• F. False

Answer: True

A wedge looks like two ramps placed back to back, forming a point. An axe blade is a good example.

Question 3

Give one example of a wedge that you might find at home.

Model answer: A knife (also acceptable: doorstop, axe, chisel, zipper).

A knife blade is shaped like a wedge — it uses its thin edge to push food apart when you cut.