Beginning Fitness – Biomechanical Principles – Movement

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B

Which of the following is NOT a component of a lever? A. effort B. tension C. fulcrum D. load

A

What distinguishes mass from weight? A. Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity on the object. B. Weight is a measure of the amount of matter in an object, while mass is a measure of the force of gravity on the object. C. Mass is a measure of an object’s inertial force, and weight is the force exerted by that object on other objects. D. Mass and weight are synonyms and ultimately describe the same principle.

B

The elbow is considered a third class lever because __________. A. the effort is applied further from the fulcrum than the load B. the effort is applied closer to the fulcrum than the load C. the fulcrum is in the center of the lever D. the elbow is used to lift objects

C

Matter is __________. A. the amount of energy contained within an object B. a measure of the force gravity exerts on objects C. something that has mass and occupies space D. a measure of an object’s inertial force

True

Swinging a tennis racket against a ball is an example of a third class lever.

False

The first class lever is the most common lever in the human body.

B

Second and third class levers are differentiated by __________. A. the location of the fulcrum B. the location of the load C. the presence of multiple loads D. the type of fulcrum present

C

What distinguishes the three different classes of levers found in the human body? A. where they are located in the body B. how useful they are for performing work C. where the components of the lever are located D. how many moving parts the lever has

B

What is the difference between velocity and acceleration? A. Velocity describes an object’s position and acceleration describes how fast it moves. B. Velocity is how fast an object moves and acceleration is the rate of change in velocity. C. Velocity is used to determine the magnitude of force acting on an object, and acceleration isn’t. D. Velocity is a time-dependent property of an object, while acceleration is not.

C

What is BEST to say about a runner who is running at a constant velocity? A. Their acceleration is positive. B. Their acceleration is negative. C. Their acceleration is zero. D. Their acceleration cannot be determined.

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