P4 - Explaining Motion Flashcards
What are the units for speed?
m/s.
What are the units for distance travelled?
m.
What are the units for time taken?
s.
What is the speed of an object at a particular point in time called?
The instantaneous speed.
What are the units for acceleration?
m/s2.
What are the units for change in speed?
m/s.
What are the units for Time taken?
s.
What are the properties of forces in an interaction pair?
- They are equal in size.
- They are opposite in direction and act on different objects.
What do we call it when an object is resting on a surface?
Reaction of the surface.
Note to remember when drawing force arrows.
Arrows are always drawn with the tail end touching the object, even if the force is pushing the object.
So if o was a person it would be o <—[]
NOT o—>[]
What are the units for Momentum?
kg m/s.
What are the units for Mass?
kg.
What are the units for Velocity?
m/s.
What are the units for Resultant Force?
N.
What are the units for Time the force acts for?
s.
What are the units for Kinetic energy?
J.
What is the force called that causes an object to move?
The driving force.
What is the force called that restricts an object from moving?
The counter force.
At what point would a skydiver stop accelerating and travel at a constant speed?
When air resistance and gravity become equal and opposite.
What are the units for Work done by a force?
J.
What are the units for Force?
N.
What are the units for Distance moved in the direction of the force?
m.
What are the units for Change in GPE?
J.
What are the units for Weight?
N.
