BARU
Ukuran huruf
Lembar kerjaSimple Machines
Total soal: 20
Worksheet time: 19mins
________________ is done whenever a force moves an object a distance.
Load
Friction
Force
Work
How can simple machines make work easier?
by decreasing the force needed to complete the task
by increasing the friction between the machine and the object
by adding more work on the object than originally applied
by removing the force of gravity on the object
Simple machines can make work easier by reducing the input force needed to move an object. However, there is a trade off for decreased input. What is the trade off?
The distance the object is moved is increased.
The distance the object is moved is decreased.
The amount of work is increased.
The amount of work is decreased.
A doorknob is an example of a _______.
wheel and axle
inclined plane
pulley
wedge
An example of a lever is a ________.
doorstop
drill
staircase
hammer
The fixed point around which a lever rotates is know as the
wheel.
fulcrum.
input force.
output force.
A simple machine that splits an object apart is a _______.
inclined plane
fulcrum
wedge
lever
A ramp is an example of a(n) _______.
inclined plane
fulcrum
force
lever
Which simple machine would be the MOST efficient for lifting an object 30 meters off the ground?
pulley
screw
wedge
lever
A doorknob is a simple machine made up of 2 circular objects of different sizes. When turning a doorknob, what type of simple machine is being used?
inclined plane
wheel and axle
wedge
pulley
The bow or front of a boat splits the water as the boat moves. What kind of simple machine would the bow of the boat be?
wedge
screw
ramp
lever
Using the back of a hammer makes it much easier to remove a nail from a wooden board. What kind of simple machine would the hammer be classified as if you are using it for this purpose?
Wedge
Lever
Pullye
Inclined Plane
Which of the following is NOT an example of the simple machine know as a screw?
the lid of a jar
a bolt
a drill bit
a crowbar
Which of the following is NOT one of the things a machine can do?
Changes the amount of force required.
Changes the distance over which the force is exerted.
Changes the direction of the force.
Changes the amount of work done.
Workers push a heavy box up an inclined plane and onto a moving truck. Which best explains why these workers use an inclined plane?
It makes their work easier because it requires less effort.
It decreases the amount of work they have to do.
It increases the amount of friction necessary to do the task.
It makes the box weigh less.
What is the formula needed to solve for work?
w = f/d
w = f*d
w = f+d
If you push a cart with a force of 60 N for 2 m, how much work have you done?
120 J
30 J
120 N
30 N
Two people shove on a wall with 100 N of force. The wall does not move. How much work have they done?
100J
100N
0J
0N
A 100 Newton force is applied to move a 15 kg object a distance of 5 meters. How much work is done?
1500 Joules
