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Opiq 5 - Simple Machines (Structures and Devices) Flashcards | StudBud
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Opiq 5 - Simple Machines (Structures and Devices)
Opiq 5 - Simple Machines (Structures and Devices)
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1
Zip lines utilize pulleys that must be both lightweight and strong.
False
True
2
What makes opening a vacuum-sealed jar difficult?
The lid is too tight
The vacuum prevents air from entering
The jar is made of thick glass
The jar is too heavy
3
How do stairs demonstrate the principal of an incline?
They make climbing easier by reducing effort
They take up less space than ladders
They are always straight
They require more energy than ladders
4
A wheelbarrow has two wheels to assist in moving heavy objects.
True
False
5
The axle of a steering wheel controls the back wheels of a car.
True
False
6
What does it mean if something is elastic?
It makes a noise when touched
It can float on water
It stretches and returns to its original shape
It becomes hard when squeezed
7
What makes a switchback (serpentine road) an effective incline?
It is steeper
It is short
It is easier to climb by crossing side to side
It requires more force
8
Why are spings used in mattresses and trampolines?
To make them heavier
To make them colorful
To stop them from moving
To make them soft and bouncy
9
What is unique about second-class levers?
The force and load move in opposite directions
They require more energy
They are less common than other lever types
The hand and load move in the same direction
10
+What characteristic makes levers more functional?
Keeping the fulcrum and load close together
Increasing hand movement
Having a long handle
Using maximum force
11
What is the main purpose of a lever
To gain a mechanical advantage
To create a complex machine
To make things look decorative
It increases hand movement
12
Most faucets today use wheels to control water flow
True
False
13
What is an incline primarily used for
creating art
measuring distances
reducing force needed to move an object
decoration
14
What does it mean if a material is durable?
It is very soft and squishy
It breaks easily
It lasts a long time and is strong
It melts when it gets hot
15
Axle wheels require more energy to rotate than the objects they are attached to.
True
False
16
Pulleys are used to change the direction of a rope and reduce friction.
False
True
17
What makes a wedge different from a regular incline?
They are only used in construction
A wedge is a moving incline
A wedge is stationary
They are not related
18
How do screws function as an incline?
They are always horizontal
They cannot lift things
They are twisted around an axis
They are completely flat
19
Which of these is a natural wedge?
A wrench
A hammer
A doorstop
A ladder
20
Which of the follow is an example of a third-class lever?
A bottle opener
A fishing rod
A bicycle hand brake
A see-saw
21
Which of these is an elastic material?
A rubber band
A glass bottle
A wooden block
A rock
22
What helps a bungee jumper bounce back after jumping off a high platform?
A metal chain
A strong rope
A plastic stick
An elastic cord
23
How is a third-class lever different from other types of levers?
They make lifting easier
They always have the fulcrum at the end
They produce large movements with little force
They decrease hand movement
24
In a first-class lever, where is the fulcrum typically located?
At the center of the lever
Near the load
At the end of the lever
Wherever the user chooses
25
Which of these body parts is elastic and helps you move?
Muscles
Teeth
Nails
Bones
26
Wheels help reduce friction, making it easier to move items.
True
False
27
Which of these objects is built using elastic materials?
A glass window
A wooden chair
A trampoline
A brick wall
28
Why are triangles often used in building bridges and towers?
Because they look pretty
Because they are the weakest shape
Because they are easy to break
Because they make structures strong and stable
29
Which of these is a durable material?
Metal
Glass
Cotton
Paper
30
Why are wedge-shaped teeth useful for predators?
They easily penetrate the skin of prey
They prevent animals from eating
They help animals communicate
They look attractive
31
Why are tubes used in building structures like bridges and towers?
They are weak and bendy
They help save material and make structures strong
They are soft and easy to shape
They are only used for decoration
