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GIVING BRAINLIEST PLSSSSS IM TIMED
_____ is the use of force to move or change the position or motion of an object.
Work
Acceleration
Friction
Inertia
4.
Choose the best answer.
A(n) _____ is the point that a lever pivots.
bar
pulley
wheel and axle
fulcrum
5.
Choose the best answer.
A(n) _____ is a machine that makes work easier and has no or few moving parts.
complex machine
compound machine
simple machine
easy machine
6.
Choose the best answer.
A(n) _____ is made of two or more simple machines.
complex machine
scientific machine
compound machine
electric machine
7.
Which of these is an example of work being done?
A child pushes a toy car across the floor.
A woman opens a door.
A soccer player hits a ball in the air with his head, and its direction changes.
All of these
8.
Choose the best answer.
A(n) _____ is made of a round shape that rolls and a rod that it turns around.
wheel and axle
fulcrum
pulley
lever
9.
Choose the best answer.
A(n) _____ is made of a bar that pivots at a fixed point.
lever
wheel and axle
pulley
fulcrum
10.
Choose the best answer.
A(n) _____ is an inclined plane wrapped around a post.
lever
screw
wedge
pulley
11.
Choose the best answer.
A(n) _____ is two inclined planes placed back to back.
wedge
pulley
screw
lever
12.
Choose the best answer.
A(n) _____ looks like a ramp.
screw
inclined plane
wedge
pulley
13.
Sagot :
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