SIFT Mechanical comprehension Exam with complete solution graded A+

Newtons 1st law of Motion - An object at rest will remain at rest and an object in motion will remain in motion until a force is applied Earths force of Gravity -Fg = Kg or lbm x 9.8m/s^2 or 32.2 ft/s^2 Fg = m x g Newtons 2nd law of Motion - Acceleration of an object will be proportional to the sum of the forces being applied. F = M x A. M is mass in kilograms (kg) or pounds mass (lbm) and A (acceleration) is expressed as m/s^2 or ft/s^2 Newtons 3rd law of motion - For every action there is an equal and opposite reaction. Centripetal Force - Is a force that makes an object travel along a curved path Centrifugal Force - Pulls an object toward the outside of the curved path Scalar - Scalar values have magnitude but no direction Vector - Tells how large an object is and the direction it's acting Torque - Twisting force which attempts to rotate an object. T ( Newton Meters (Nm) or foot pounds force (lbf-ft) = F (force) x R (torque arm or distance from the fulcrum) Static Friction - Is the force of friction when two objects begin to slide past each other. Kinetic Friction - Is the force of friction opposing an object as it is sliding past another.Gravitational Potential Energy - The higher an objects moves the more potential it has. PE (joules or ft lbs force) = m (mass of the object) X gravity (9.8 m/s^2) X h (height)