Physics KS3 Forces (randomized) Flashcards
Which force are the elephant and the lorry exerting on each other?
Gravity
If you’re talking about a force, are you talking about Mass or Weight?
Weight
If you’re talking about something measured in Newtons, are you talking about Mass or Weight?
Weight
Remember that Weight = Mass x Gravitational Field Strength. If Mass = 0.2kg (200g) and Gravitational Field Strength = 10 N/kg, what is Weight?
Weight= 0.2 x 10 = 2 N
How can drag forces such as water resistance or air resistance be reduced?
Streamlining/use streamlined shapes
Description: Force which slows objects moving through air – Name the force and state whether contact or non-contact
Air resistance/drag / Contact
Forces are measured in ……. (units)
Newtons or N / (N must be uppercase)
What is a force?
A force is a push or pull that acts on an object
Description: Forces caused when objects eg springs, string are stretched/compressed – Name the force and state whether contact or non-contact
Tension/Compression / Contact
If you’re talking about something that changes from planet to planet, are you talking about Mass or Weight?
Weight
Description: Attraction between two objects with mass (Gravity) – Name the force and state whether contact or non-contact
Weight / Non-contact
To measure a force the instrument you use is a …….
newtonmeter or forcemeter or spring balance
Description: Attraction (pull towards) or repulsion (push away) of magnets and magnetic materials – Name the force and state whether contact or non-contact
Magnetism/Magnetic / Non-contact
If you’re talking about the kg, are you talking about Mass or Weight?
Mass
Description: Upward push of water on an object – Name the force and state whether contact or non-contact
Upthrust / Contact
If you’re talking about something that doesn’t change from planet to planet, are you talking about Mass or Weight?
Mass
Description: Forward push of an object moving on a solid surface – Name the force and state whether contact or non-contact
Thrust/Forward force / Contact
Sometimes one body can have an effect on another without having to be in contact, these forces are known as ……. forces.
Non-contact
Which force is represented by the arrows around the third car?
Air resistance
If you’re talking about the Newton/N, are you talking about Mass or Weight?
Weight
How can friction between solid objects be reduced?
Lubrication eg oil on bike chains or wax on snowboards
Description: Force which slows objects moving through water – Name the force and state whether contact or non-contact
Water resistance/drag / Contact
Description: The force pushing up on an object as it moves through the air, caused by differences in air pressure. – Name the force and state whether contact or non-contact
Lift / Contact
Which force is represented here?
Water resistance
