Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Science Forces > Forces > Flashcards

Forces Flashcards

(55 cards)

Start Studying
1
Q

What is the SI unit that measures the strength of force

A

Newtons

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

What is a force

A

A push or pull

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

What is the overall force on an object called

A

Net force

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

What is and

Unbalanced force

A

A net force acting on an object

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

What can unbalanced forces called

A

Speed up
Slow down
Change direction

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

What is a balance force

A

Equal forces acting in opposite directions

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

What does a balanced force cause

A

Trick question

It will not change the objects motion

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

What happens when two forces act in the same direction

A

They add together

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

What is the net force when you add equal forces exerted in opposite directions

A

0

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

Describe how to combine unequal forces acting in opposite directions

A

You subtract the smaller force from the larger force. The direction of the resulting force is the direction of the larger original force

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

What is the difference between mass and weight

A

Mass- (kg) amount of matter in an object

Weight- (N) amount of force on an object due to gravity

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

Name the formula for calculating mass and weight on different planets like earth

A

Strength of gravitational field mass

Earth 9.8
Mass 50 kg

9.8x50=490(N) weight

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

What do we use to measure force

A

A Newton spring scale

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

What is the definition of friction

A

Friction is the force between two objects rubbing together

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

Name 2 ways forces are described

A

Strength

Direction in which they act

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

How does a cyclist reduce friction

A

Higher inflated tires

Smoother tires

Skinner tires

Less weight

Road condition

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

Give an example of kinetic energy into heat energy

A

Rubbing your hands together

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

What is the definition of streamlining

A

To reduce surface to surface resistance

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

What is the definition of minimizing surface contact

A

To reduce the rubbing area between two objects

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

What is the definition of lubrication

A

To apply wax, grease or oil to the rubbing surfaces between two objects

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

A toboggan slides down a hill. Is this work?

A

Yes

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

A weightlifter holds 200 kg mass motionless above his head. Is this work?

A

No because there is no movement being applied to the force.

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

You push on a car stuck in the snow. Is it work?

Study These Flashcards
A

No because the car isn’t moving and you are pushing in the opposite direction as the force

24
Q

In order for you to do work on an object what has to happen?

Study These Flashcards
A

The object has to move some distance as a result of your force

25
The amount of work you do on an object depends on:
The amount of force you exert and the distance the object moves
26
What formula do you use to determine the amount of work done on an object?
Force x Distance
27
What is the SI unit of work
Newton x Meter
28
What is the amount of work you do when you exert a force of 1 Newton to move an object a distance of 1 meter?
1 joule
29
What is power?
Power is the rate at which work is done on an object. Power equals the amount of work done on an object in a unit of time example joules divided by second equals a watt
30
What is the formula used to calculate power?
Power= work divided by time Watt= joules divided by time
31
What does the universal law of gravitation state ?
The force of gravity. Acts on all objects in the universe
32
what is the definition of gravity?
The force that accelerates objects towards earth
33
How does Oil between machine parts reduce friction?
It makes the surface smoother by changing from sliding friction to fluid friction.
34
What kind of friction occurs when moving parts have ball bearings?
Rolling friction
35
What kind of friction requires the most force to overcome, rolling friction ,sliding friction or fluid friction?
Sliding friction Rolling friction Fluid friction
36
Fluid friction occurs when
An object moves through a liquid or gas
37
Sliding friction occurs when
Solid surfaces slide over each other
38
Rolling friction occurs when
An Object rolls over a surface
39
Why does some fiction occur with seemingly smooth surfaces
The object is still being a rubbed against the surface. Therefore of force is still being applied
40
Give the definition of Air resistance
Air resistance is the kind of friction that slows a falling object
41
Give the definition of terminal velocity
A falling object reaches this when forces of gravity and air resistance are balanced
42
What is the definition of freefall
The state that exists when the only force acting on an object is gravity
43
Near the surface of Earth what is the acceleration of an object due to the force of gravity
9.8 m/s per second
44
An object that is thrown is called a
Projectile
45
What is the definition of work
A force that acts upon and objects to cause movement Work = Work x distance
46
Give the definition of energy
Energy is a quantity that describes the amount of work that can be performed by a force
47
What are the different types of energy
Light heat sound Motion
48
What is the definition of potential energy
Potential energy is the stored energy of position possessed by an object
49
Give the definition of Kinetic energy
Kinetic energy is the energy of motion
50
What is the law of conservation of energy ,when was it made and what does it apply to
Energy can't be created or destroyed Energy can be transferred or transformed 19th century Applies to any system
51
Mechanical advantage is the .....
Number of times a machine multiplies your effort force
52
What is the formula for mechanical advantage
MA = output force in newtons F out ------------------- Input force in newtons F in
53
What is a machine
A machine is any mechanical system that reduces the force required to accomplish work
54
What is input force
Input force is the work done by you
55
What does a pulley do and what is the mechanical advantage
A fixed pulley only changes the direction between the input and output force Mechanical advantage of one

Science Forces (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions