3. What type of a lever is a wheel and axle ?
A. First class lever C. Third class lever
B. Second class lever D. Fourth class lever
4. Which of these is NOT an inclined plane.
A. ramp
B. stairs c. slide
D. egg beater
5. Which of these is NOT a wheel and axle?
A. key, paper clip C. door knob, steering wheel
B. bicycle, windlass D. grinders, capstan
6. Which of the following uses the principle of wedge
A. key
C. stairs
B. doorknob
D. knife
7. What becomes of the effort in a pulley system
which has two strings supporting the movable
pulley ?
A. effort is less
C. effort is doubled
B. remains the same D. effort is tripled
8.Which of these tools should be a part of the tool box
driver ?
A. wheel and axle
C. pulley
B. jack
D. weighing scale
9.A simple machine that can be used to roll a barrel in
truck.
A. Inclined plane
C. Crowbar
B. Lever
D. Plier​