What is Biomechanics?
What are the two primary goals of sport and exercise biomechanics?
What is performance improvement and injury prevention?
If a net external force is applied to an object, the object will do one of these three things.
What are speed up, slow down, or change direction?
This kinematic variable describes the rate of displacement.
What is velocity?
Newton's first law states that
What is "a body at rest will remain at rest....."
This is the weight of an object with a mass of 65 kg.
What is 637.7 N?
This measure describes the measure of the force of gravity acting on an object's mass.
What is body/system weight?
This non-contact force is very important in the analysis of projectiles
What is gravity/the gravitational force?
According to the conventions for position, which two directions are represented as positive values?
The formula for linear momentum is
A horizontal force of 350 N and a vertical force of 700 N is applied into the ground. This is the angle that the resultant force will act upon.
What is 63.4 degrees?
This branch of biomechanics assumes that the body of interest consists of a series of rigid links that do not deform when forces are applied to them. It is the primary area of interest to sport and exercise biomechanists.
What is rigid-body mechanics?
This is the contact force that acts parallel to the surface of two objects in contact with other that are moving relative to each other. It is due to molecular interactions between the objects.
What is dynamic friction?
An object that is speeding up in the negative direction will have this type of acceleration.
What is a negative acceleration?
This is the law of motion that forms the basis for free-body diagrams.
What is Newton's third law?
A football is kicked into the air with an initial horizontal velocity of 19 m/s and initial vertical velocity of 25 m/s. How long will it take the football to reach the peak of its trajectory (i.e. the point of maximal vertical displacement)?
What is 2.55 seconds?
This type of analysis deals with the understanding of the effects, or description, of motion, without any attention paid to the underlying causes.
This is a visual representation of all forces acting on a system or body of interest.
These are the two forces that have the potential to impact the motion of a projectile
What are gravity and air resistance?
Sprinters run more on the front of their feet and tend to contact the ground with their feet directly underneath their body in order to minimize this measure.
What is braking impulse?
A volleyball player leaves the ground during a vertical jump attempt with an initial vertical velocity of 3.3 m/s. Calculate their maximal jump height.
What is 0.55 m?
A coach may use principles of biomechanics to do this to improve their athlete's performance.
What is change their technique?
This formula can be used to compose a resultant vector based on relationships between sides of a right triangle.
What is pythagorean theorem/a2 + b2 = c2?
If you throw a ball up into the air and catch it at exactly the same height, this is the exact moment where vertical velocity is the highest.
What is the instant of release?
Over the course of a 100m sprint from the acceleration phase to the max velocity phase, propulsive impulse will
What is decrease?
A boxer contacts the heavy bag with their hand, which has a mass of 1.5 kg. When the glove first makes contact with the bag, it is moving with a velocity of 42 m/s. 0.146 seconds later, the boxer's hand comes to a complete stop. What is the average force exerted on the boxer's hand during this interval?
What is -431.5 N?