Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science > laws of motion > Flashcards

laws of motion Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Force

A

A push or pull on an object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Contact force

A

A pressure pull on one object by another that is touching it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Contact forces can be weak like when you

A

press the keys on a keyboard

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Contact forces can be strong such as when

A

large sections of rock moves causing an earthquake

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Gravity

A

An attractive force that exists between all objects that have mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Mass

A

The amount of matter in an object often measured in kilograms (kg)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Who developed a lot of universal gravitation

A

Sir Isaac Newton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the law of universal gravitation

A

That all objects are attracted to each other by gravitational force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does the strength of a force depend on

A

The mass of each object in the distance between them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When the mass of one or both objects increase

A

the gravitational force between them also increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The attraction between objects decreases as a

A

distance between the objects increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Weight

A

The gravitational force exerted on an object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The gravitational force earth exerts on you is _______ than the force exerted by any other object

A

Greater

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The object’s weight is ________ to its mass

A

proportional

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Near Earth’s surface, the way of an object in Newton’s is about blank times its mass in kilograms

A

10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How much change in weight is there when the distance increases greatly

A

No significant change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

An astronaut in space is still only about blank of what it is on earth

A

90%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Friction

A

A force of a system motion of two surfaces that are touching

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Static friction

A

Prevent surfaces from sliding past each other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Up to a limit what does a static friction do

A

The strength of static friction changes to match the applied force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Sliding friction

A

Opposes the motion of surfaces sliding past each other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What happens when static friction reaches its limit between surfaces

A

The box will move

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Fluid friction

A

Friction between a surface and a fluid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Air resistance

A

Fluid friction between the surface and air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What happens when you decrease the surface area towards the oncoming fluid

A

It decreases the air resistance against the object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What causes friction

A

The interactions between the tiny bumps on surfaces as they rub against each other. The bumps on each surface bed and exert a force on each other making it hard for the surface to slip over each other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What happens when a positive charge on one surface slides by negative charge on the other surface

A

An attraction occurs between the particles

28
Q

What makes up all surfaces

A

Small particles (atoms and molecules)

29
Q

What happens with less friction

A

Is easier for surfaces to slide past each other

30
Q

What happens when you rub soapy hands together in the soapy water slightly separates the surfaces of your hands

A

It causes less contact between the microscopic dips and bumps and between the electrical charges of your hands

31
Q

Net force

A

The combination of all the forces acting on an object

32
Q

What happens when two or more forces act on an object

A

The forces combine

33
Q

What happens when you combine forces in the same direction

A

The net force is the sum of the individual forces

34
Q

What happens when you combine forces in opposite directions

A

the forces will cancel, resulting in a net force of zero and no movement.

35
Q

Balanced forces

A

Forces acting on an object that combine and form a net force of zero

36
Q

Unbalanced forces

A

Forces acting on an object that combined and form a net force that is not zero

37
Q

What happens when equal forces act on an object in opposite directions

A

The net force on the object is zero

38
Q

Newton’s first law of motion

A

If a net force of an object is zero the motion of the object has not changed. If something isn’t pushed it won’t move

39
Q

According to news first law motion what do bounds forces cause in an object’s velocity

A

No change, which is true when an object is at rest or in motion

40
Q

Terminal Velocity

A

The constant velocity reached when air resistance equals the force of gravity acting on a falling object

41
Q

Newton’s first law of motion only applies to what

A

Balance forces acting on an object

42
Q

What happens when unbalanced forces act on an object at rest

A

The object starts moving

43
Q

What happens when an unbalanced force is act on already moving object

A

The object speed, direction of motion, or both change

44
Q

Inertia

A

The tendency of an object to resist the change in its motion

45
Q

On Earth friction can be what

A

Reduce but not totally removed

46
Q

What has happened for an object to start moving

A

A first grader than a static friction must be applied to it

47
Q

What else happens to keep the object in motion

A

force at least as strong as friction must be applied continuously

48
Q

How do objects stop moving

A

Because friction or another force acts on them

49
Q

Circular motion

A

Any motion in which an object is moving along a curved path

50
Q

When will an object speed up

A

If acceleration points in the same direction as the velocity

51
Q

When will an objects slow down

A

if the direction of the net force on an object is opposite to the direction an object moves

52
Q

What is a way that unbalanced forces can change an object’s velocity

A

to change its direction

53
Q

Another name for a change in velocity over time

A

acceleration

54
Q

unbalanced forces can make an object accelerate by

A

changing its speed, its direction, or both

55
Q

Inertia of the moving object and the centripetal force acting on the object produce what

A

the circular motion of the ball and the moon

56
Q

what does newton’s second law of motion descrive

A

the relationship between an object’s change in velocity over time, or acceleration, and unbalanced forces acting on the object

57
Q

centripetal force

A

In circular motion, a force that acts perpendicular to the direction emotion, towards the center of the curve

58
Q

What does an object that experiences centripetal pedal force

A

Satellite

59
Q

What path does a satellite tend to move along

A

A straight path because of inertia

60
Q

What is essential pedal force that keeps a satellite in orbit by changing its direction

A

Gravity

61
Q

noncontact force

A

A force that one object can apply to another object without touching

62
Q

The gravitational force between objects __________ as the distance between the objects ___________

A

decrease, increase (line that goes down then to the right)

63
Q

Static friction _______ from moving, sliding _________ the motion

A

prevents, slows

64
Q

same strength equals

A

balanced

65
Q

different strength equals

A

unbalanced

Science (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions