Physics - Year 9 - Forces Flashcards
What is the equation for work done?
Work done = Force x Displacement
W = F x S
What is gravity?
Gravity is a pull force that acts between all objects with mass.
What are 2 things that make the force of gravity bigger?
- bigger mass
- the closer together the objects are
What is the weight equation?
Weight = mass x GFS W = m x g
What is the equation for Hooke’s law?
Force = spring constant x extension F = k e
What is the equation for Newton’s 2nd law?
Force = mass x acceleration f = ma
How do you calculate the mean speed?
mean speed = distance ÷ time
How do you calculate the acceleration of an object?
acceleration = change in velocity ÷ time
How would you calculate resultant force?
The smaller force subtracted from the larger force
What is the equation for finding the elastic potential energy?
EPE = 1/2 k e²
What does it mean when an force is said to do ‘work’?
The force causes an object to be displaced over a distance.
What is the equation for finding the GPE store?
GPE = mgh
What happens when work is done against gravity?
The GPE store increases.
What happens when work is done against gravity?
The GPE store increases.
What happens when work is done against gravity?
The GPE store increases.
