SP8-9 Flashcards
What are the units for energy?
Joules
how would you find the amount of work done
Work done = Force * Distance
how would you find the amount of force needed for the work done
Force = Energy/ Distance
how would you find the amount of distance required for the work done
Distance = Energy/ Force
for the E=Fd formula, what are the units for Energy, Force and distance?
(in order of statement). Joules, Newtons, metres
how would you find the weight of an object
Weight = mass x gravitational field strength/ acceleration of gravity
what is the gravitational field strength of earth?
10 N/Kg
What is the equation for POWER
Power = work done/time
what is a Watt to a Joule and time
A watt is a Joule per second
what is a contact force
Force exerted on two objects which require physical touch
Name an example for a contact force(s)
Friction, tension, air resistance, reaction force
What is a non-contact force
A force that is exerted on two objects which do not require physical touch
what is an example of non-contact force(s)
Magnetic fields, electrostatic forces, Gravitational force.
What is resultant force?
the difference of all the forces acting on an object, the net force.
what is Newton’s third law
Every action has an equal and opposite reaction.
