Mechanics ? Flashcards
1
Q
Couple (torque)
A
Two forces acting on an object that have:
- torque
- resultant force of 0
- equal magnitude and opposite direction
2
Q
Find torque of a couple
A
Torque = magnitude of forces*distance between them
3
Q
Find torque
A
Torque = force*perpendicular distance from pivot (M = rF)
4
Q
Find pressure
A
Pressure = force/area (P = F/A)
5
Q
Find pressure due to liquid weight
A
Pressure = liquid density*g*depth (P = ρgh)
6
Q
Standard air pressure
A
100 kPa
7
Q
Find buoyancy
A
Buoyancy = weight of liquid displaced
= liquid densitygvolume of liquid displaced
(F = ρgV)
8
Q
Find work done
A
Work done = force*distance
E = Fs
9
Q
Find power (using work)
A
Power = work done/time
E/t
10
Q
Work done
A
Energy transferred by moving an object along a force’s line of action
11
Q
Power
A
Rate of work done
12
Q
Find power (using force)
A
Power = force*velocity (P = Fv)
13
Q
Gravitational potential energy
A
Work done against weight
14
Q
Find gravitational potential energy
A
Energy = weight*height (E = mgh)
15
Q
Find kinetic energy
A
Energy = 0.5*mass*velocity^2 (E = 0.5mv²)
