Forces Flashcards
(33 cards)
What does a vector quantity have?
Magnitude and direction
What do scalar quantities have?
Just magnitude
What can also be a force?
Weight
On he left side of a pivot, what direction does the moment move in?
Anti clockwise
On the right side of a pivot, what direction does the moment act in?
Clockwise
What is the limit of proportionality?
The point of which a spring is stretched and deforms
How are extension of a spring and force connected?
They are directly proportional
What is a moment?
The turning effect of a force
How do you get the maximum moment?
Push at right angles
How does an object float?
If it’s weight = upthrust
Where is there a low pressure atmosphere?
The sky
What’s the typical walking speed?
1.5 m/s
What’s a typical running speed?
3m/s
Typical cycling speed
6m/s
Car speed
25m/s
Train speed
55m/s
Plane speed
250m/s
Speed of sound
330m/s
How do you find acceleration?
Change in velocity over time
On a graph, what signifies the acceleration?
Gradient
When you push against something, why don’t you move?
Inertia
what is conservation of momentum?
When two colliding items have the same momentum afterwards
What is a contact force?
Two objects interacting physically
What is non-contact force?
objects not touching i.e magnets
