Questions and Answers (2026) |
Question and Answer Review |
Graded A+
• force . Answer: A push or a pull/mass x acceleration
• dynamics . Answer: systems in motion with acceleration
• statics . Answer: systems at rest with no acceleration
• kinematics . Answer: study of motion
• lever . Answer: A rigid bar that is free to move around a fixed point
• speed . Answer: how fast an object is moving
• axis . Answer: point of rotation around which a lever moves
• first class lever . Answer: fulcrum in the middle/seesaw
• second class lever . Answer: the load is between the fulcrum and the
effort/wheelbarrow
,• third class lever . Answer: The fulcrum is at one end of the bar and the
effort is between the fulcrum and the resistance/skull
• torque . Answer: turning effect of an eccentric force
• eccentric force . Answer: force applied in a direction not in line with
the center of rotation of an object with a fixed axis
• force arm . Answer: distance between force and axis
• pulley . Answer: A simple machine that consists of a rope that fits into
a groove in a wheel
• linear . Answer: straight line
• Angular (Rotational) Motion . Answer: motion around an axis
• displacement . Answer: Distance and direction of an object's change in
position from the starting point.
• angular displacement . Answer: the change in the angle as an object
rotates
,• linear displacement . Answer: distance that a system moves in a
straight line
• inertia . Answer: The tendency of an object to resist a change in motion
• Newton's Second Law . Answer: Force equals mass times acceleration
• Newton's Third Law . Answer: For every action there is an equal and
opposite reaction
• friction . Answer: A force that opposes motion between two surfaces
that are in contact
• ATP-PC system . Answer: -phosphocreatine is needed for fuel
-ATP lasts 1-2 seconds, 15 seconds with PC
- 1 molecule of PC= 1 molecule of ATP
- ATP is fully restored in 2 minutes
PC in 30 seconds
• cellular respiration . Answer: Process that releases energy by breaking
down glucose and other food molecules in the presence of oxygen
explosive movements
• Glycolytic System . Answer: glucose for fuel, glycolysis and lactate
fermentation to burn it. lasts for 1-2 minutes. anaerobic strength train
, • Oxidative System . Answer: the body's most complex energy system,
which generates energy by disassembling fuels with the aid of oxygen
and has a very high energy yield
• Static friction . Answer: Friction that acts on objects that are not
moving
• Kinetic froction . Answer: Friction between two objects moving across
one another
• rolling friction . Answer: friction that occurs when an object rolls over
a surface
• Balance . Answer: Controlling equilibrium
• Equilibrium . Answer: State of no acceleration with the body at rest
• Stability equilibrium . Answer: Body is completely at rest
• center of gravity . Answer: A fixed point in a material body through
which the resultant force of gravitational attraction acts.
• Momentum . Answer: The product of an object's mass and velocity