Torque is a measure of the tendency of a force to rotate an object about an axis. It is defined mathematically as the cross product of the lever arm distance and the force applied, which tends to produce rotation. Newton's laws for linear motion can be applied to rotational motion by substituting torque for force, angular position for linear position, angular velocity for linear velocity, and angular acceleration for linear acceleration. Horsepower, a unit of power, was originally defined based on the work a horse could do in one minute.

1. Rotational motion, Newton's law

2. - The tendency of a force to rotate an object about an
axis, fulcrum, or pivot.
- A torque can be thought of as a twist to an object.
- Mathematically, torque is defined as the cross product of the lever-
arm distance and force, which tends to produce rotation.
TORQUE

4. Angular
Position
Angular
Velocity
ω = d𝞱/ dt
Angular
Acceleration
α= dω / dt

5. Newton’s law for objects moving along a straight line describes the
relationship between the force applied to an object and its resulting
acceleration
Work: Wlm = ʃ F dx
= Fx
Wrot = ʃ τ d𝞱
= τ𝞱
Power: Plm = dW/dt
= F (dx/dt)
= Fv
Prot = dW/dt
= τ (d𝞱/dt)
= τω

6. 1 hp = 745.699872 W
In Watt's judgement, one horse can
do 33,000 foot-pounds of work every
minute.
Horsepower
Dodge Viper 450
Ferrari 355 F1 375
Shelby Series 1 320
Lotus Esprit V8 350
Chevrolet Corvette 345
Porsche Carrera 300
Mitsubishi 3000GT twin-turbo 320
Ford Escort 110
= X 50
HORSE POWER