Mechanical Comprehension – Test 2

Renewable energy is an energy source that is replenished by natural processes, over human time scales.

Newton’s first law of motion states that a body tends to stay in rest, or stay in motion.

Thrust is the reaction force that pushes a body forward in response to a backward force.

Turning point is the position where the velocity of a particle, in one-dimensional motion, changes sign.

Equilibrium point is where the assumed conservative, net force on a particle, given by the slope of its potential energy curve, is zero

Centripetal force represents any net force causing uniform circular motion.

Net external force is the vector sum of all external forces acting on an object or system; causing a mass to accelerate.

Mechanical energy is the sum of the kinetic and potential energies.

Free fall is the situation in which the only force acting on an object is gravity.

Kinetic energy is the energy of motion, one-half an object’s mass times the square of its speed.

Center of mass is the weighted average position of the mass.

conservative force is the force that does work independent of path

terminal velocity is the constant velocity achieved by a falling object, which occurs when the weight of the object is balanced by the upward drag force

Friction is the force that opposes relative motion or attempts at motion between systems in contact

Tension is the pulling force that acts along a stretched flexible connector, such as a rope or cable.

Work is done when a force acts on something that undergoes a displacement from one position to another.