8.1 Force and acceleration Flashcards
1
Q
Define friction
A
force opposing the motion of a surface that moves or tries to move across another surface
2
Q
What is newtons 1st law?
A
an object continues at rest or in uniform motion unless it is acted on by a resultant force
3
Q
An object moving at constant velocity is either :
A
- acted on by no forces
2. the forces acting on it are balanced (resultant force is 0)
4
Q
What is newtons 2nd law?
A
the rate of change of momentum of an object is proportional to the resultant force on it
5
Q
What is the equation affiliated with newtons 2nd law?
A
The resultant force of an object in a direction = the mass of that objet x the acceleration of that object in that direction F= △p/t p=mv F= m△v/t v/t= acceleration F= ma
6
Q
Define weight
A
the force of gravity acting on an object
7
Q
What is the formula for weight?
A
w = mg
8
Q
What is weight also equal to?
A
Force
9
Q
Define inertia
A
resistance of an object to change of its motion
resistance to change of motion
