Science ~ Forces Flashcards
How do you show an object accelerating
One arrow is longer than the other
How do you show and object staying in place
Both arrows are the same length
How do you show an object moving at a constant speed
Both arrows are the same length
What are the 3 main forces
Push, pull and twist
What is a contact force
There is a contact between exerting force and receiving force
What is a non contact force
The result is visible but you cannot see the contact between the force and the agent
What are 3 contact forces
Friction, Upthrust, Air resistance
What were 3 non contact forces
Gravity, magnetic, electrostatic
Friction
Contact
Upthrust
Contact
Air resistance
Contact
Gravity
Non contact
Magnetic
Non contact
Electrostatic
Non contact
What is force measured in
Newtons ( n )
What do forces work in
Pairs opposing each other
What is the piece of apparatus used to measure forces
Newton meter
Do objects need to touch to interact
No
What are the five things forces can make objects do
-Speed up or start moving
-slow down or stop
-change direction
-Turn
-change shape
Are the forces balanced or unbalanced when the arrows are uneven
Unbalanced
Are the forces balanced when the arrows are the same length?
Balanced
What are forces
Pushes, pulls or twists
What is speed
A measure of how far you travel in a set amount of time 
How do you calculate speed
Speed = distance
————-
Time
How do you calculate time
Time = distance
————-
Speed
How do you calculate distance
Distance = speed x time
What is the abbreviation for metres per second
M/S
What is the abbreviation for miles per hour
mph
What is the abbreviation for kilometres per hour
Km/h
What does the slope of the line show in a distance time graph
The speed in which something is travelling
If the line is steeper on a distance time graph what does that show?
That the object is moving faster
What do flat sections show on a distance time graph? 
That the object has stopped
What do downhill sections show on a distance time graph? 
The object is going back towards it starting point 
What do curves represent on a distance time graph? 
The object is changing speed
How do you calculate resultant force
Minus the smaller force from the larger force
How do you calculate weight
Weight = mass x G.F.S (gravitational field strength)
Does your mass change
No
Does weight change
Yes
What is the unit for measuring G.F.S
n/kg
Are mass and weight the same
No
What is mass
The amount of matter an object contains
What is weight
The force of gravity acting on an object’s mass 
What is weight measured in
Newtons
What is gravity
Gravity is a force that acts between objects that have mass
The greater the object mass…
The greater the gravity exterted by that object
