| 51 | Mechanical efficiency (given measured performance,ideal performance) | -332s.png) |
| 52 | Mechanical efficiency for lifting object (given weight,heigth,force,distance) | -333s.png) |
| 53 | Mechanical efficiency for block and tackle (given load weight,force,number of rope pulley) | -334s.png) |
| 54 | Mechanical efficiency for block and tackle (given weight of material,weight of segments) | -335s.png) |
| 55 | Mechanical efficiency for block and tackle (given friction,length,force,distance) | -336s.png) |
| 56 | Hooke's law |  |
| 57 | Displacement of the spring (given force and constant) | -373s.png) |
| 58 | Elastic potential energy (potential energy stored in a spring ) | -376s.png) |
| 59 | Potential energy |  |
| 60 | Potential energy (mass, gravity, and altitude) | -379s.png) |
| 61 | Mass (given gravity potential energy , altitude and gravity acceleration) | -381s.png) |
| 62 | Altitude of the object (given gravity potential energy ,mass and gravity acceleration). | .-383s.png) |
| 63 | Gravitational potential energy general formula (given mass and distance) | -391s.png) |
| 64 | Potential energy (general formular) | -444s.png) |
| 65 | Tensile stress |  |
| 66 | Work done by a torque |  |
| 67 | Work done by a torque (given torque and angle of rotation) | -458s.png) |
| 68 | Angle of rotation (given work and Torque) | -459s.png) |
| 69 | Torque (given lever arm, force and angle) | -460s.png) |
| 70 | Angle of the rotation (given force and Torque) | -461s.png) |
| 71 | Force (given level arm, angle and torque) | -462s.png) |
| 72 | Length of the lever arm (given force,angle and torque) | -463s.png) |
| 73 | Torque (give work and angle of rotation) | -464s.png) |
| 74 | Torque (given force directed perpendicularly to the position of particle and arm length) | -465s.png) |
| 75 | Distance from the axis of rotation to the particle (given Torque and force) | -466s.png) |
