A hand drill consists of two mutually perpendicular…………
a) Gear
b) Pulleys
c) Wheels
d) none of these
What should you do to reduce the amount of effort needed to lift something using a first class lever?
a) move the fulcrum closer to the effort
b) move the fulcrum to the middle of the lever
c) move the fulcrum closer to the load
Which of the following is not a simple machine?
a) a tap handle
b) a jar lid
c) a screwdriver
d) a gear
Which simple machine can help us to move a sail on sailboat?
a) a lever
b) a wheel and axle
c) a gear
d) a pulley
Gear system is a kind of……….
a) lever
b) wheel and axle
c) compound machine
d) wedge
The chain of your bicycle is a …………
a) pulley
b) lever
c) screw
d) a wheel and axle
