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7th Grade - Science Force and Motion Flashcards | StudBud
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7th Grade - Science Force and Motion
7th Grade - Science Force and Motion
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1
A place or object used for comparison to determine if an object is in motion is called __?
Unbalaced force
Reference point
Balanced force
2
The condition with referance to place, location, and situation is called_____.
Pull
Reference point
Position
Distance
3
Standing against the wall is an example of______.
Friction
Pull
Push
Balanced force
4
In Newton's 2nd law, what will happen to an object is the pushing force is doubled?
The object's mass will decrease.
The acceleration of the object would also double.
The object will stop.
The acceleration of the object would decrease.
5
What best describes the feeling of weightless ness on a rollercoaster?
Inertia
Gravity
Friction
Acceleration
6
How can motion of an object be changed?
Motion of an object can never change.
Can only be changed during a full moon phase.
By applying a force to it.
7
In Newton's 3rd law, what happens to the back of a skateboard when it's pushed down in front?
The skateboard moves upward.
The skateboard propels the person forward.
The skateboard moves backward.
The skateboard moves sideways.
8
What is the mass of an object that has a force of 88N and acceleration of 12 m/s2? (HINT: F=MA)
0.14 Kg
176 Kg
1056 Kg
7.33 Kg
9
A force that pulls everything toward the center of the Earth is called ______.
Motion
Force
Gravity
Velocity
10
Regarding Newton's 2nd law, what is the formula for Force?
F = MA
Force = Mass x speed
Force = Mass x Acceleration
Force = Mass x velocity
11
An object moving along a surface suddenly increases speed, What causes this to happen?
Less friction and angle of surface is steeper
More friction and angle of surface is shallow
Less friction and angle of surface is shallow
12
The distance an object travels per unit of time is called ___.
Velocity
Speed
Acceleration
13
What is distance?
An amount of space between 2 things or people
The overall rate of speed at which an object moves
The distance an object travels per unit of time
14
For every action there is an equal and opposite reaction.
Newton's 3rd law
Newton's 2nd law
Newton's 1st law
15
What is a balanced force?
2or more forces acting inthe opposite direction on an object
A push or pull exerted on an object
Two or more forces acting in the same direction on an object
16
To draw toward oneself or itself.
Push
Pull
Motion
Speed
17
Forces that cause change in motion is called ___.
Unbalanced force
Balanced force
Inertia
Friction
18
2 or more forces that are not equal and opposite of one another; can cause change in motion is?
Unbalanced force
Physics
Inertia
Balanced force
19
What is the mass of an object that has a force of 50N and acceleration of 10 m/s2? (HINT: F=MA)
5kg
.5kg
500kg
100kg
20
When workers spread sand over icy bridges, how does this help drivers?
By making them think summer is on its way
By creating friction so the car doesn't slip and slide
By making it easy for people to see the icy spots
21
The force that keeps objects moving in a straight line; resists a change in motion is called__.
Motion
Inertia
Gravity
Friction
22
How does a reference point affect the description of motion.
The reference point tells you tells you how the object moved
The reference point tells you how far an object has moved
The reference point tells you how much matter the object has
23
The state in which one object's distance from another is changing___.
Position
Balanced Force
Inertia
Motion
24
A push or pull exerted on an object is known as_____.
Gravity
Pull
Force
Push
25
Regarding Newton's 3 laws of motionwhy is a person propelled forward when a car suddenly stops?
Object in motion stays in motion until unbalanced force acts
Acceleration is proportional to the net force on an object
Increase in force results in decrease in acceleration.
Stopping car is result in person moving forward (reaction)
26
How can friction be changed?
The force between two objects
Apply heat
Different surfaces create different amounts of friction.
27
A student is riding a bicycle and applies the brakes. Which most helps the bike to stop?
Friction
Force
Inertia
Gravity
28
One unit of force is measured in _______.
Decimal
Newton
Degree
Bell
29
What ideas are studied in Physics?
How tectonic plates work
How moon phases effect ocean tides
How force and motionwork together to explain how object move
How the human brain works
30
To press against an object with force in order to move it away.
Push
Motion
Speed
Pull
31
Which best describes Newton's 2nd law of motion?
An object at rest stays inrest unless an unbalanced act onit
Object in motion staysin motion unless unbalanced force acts
Acceleration depends on object's force and mass
Every action has equal and opposite action
32
A chair exerts a force of 20N on a floor. What's the force that the floor exerts on the chair?
40N
20N
Zero newtons
200N
33
How is distance related to motion?
When a molecules move fast due to heat.
Object's inmotion when itsdistance fromother object changing
When kinetic energy kicks in.
34
The force that one surface exerts on another when the two surfaces rub against each other is???
Inertia
Force
Motion
Friction
35
The speed of an object in a particular direction is___?
Velocity
Speed
Momenteum
36
Examples of friction is/are:
Rolling a ball across the floor
Skiing down a hill
Walking up a hill
Applying brakes in a car
37
Two dogs pulling on the same shoe, but the shoe stays in place is an example of ___.
Unbalanced force
Friction
Gravity
Balanced force
38
The science that deals with matter, energy, motion, and situation is called_____.
Physics
Biology
Chemistry
Geology
39
What is the formula for used to find speed?
S = T / D
Speed = Distance / Time
E = MC2
S = D / T
