biomechanics 0.0 / 5 ? Physical EducationBiomechanicsA2/A-levelOCR Created by: leobarnard1Created on: 10-02-20 19:16 what is newtons first law law of inertia - a body continues in a state of rest or uniform velocity unless acted upon by an external force 1 of 28 what is an example of newtons first law a golf ball will stay on the tee unless its hit 2 of 28 what is newtons 2nd law law of acceleration - a body's rate of change in momentum is proportial to the size of the force applied in the same direction 3 of 28 what is an example of newtons second law a football moves in the direction the force is applied onto it and moves with the same force applied 4 of 28 what is newtons third law law of reaction - for every action there is an equal and opposite reaction 5 of 28 what is an example of newtons third law when a tennis player hits the ball a force is applied from the racket to the ball but the ball also applies an equal force back onto the racket 6 of 28 what is biomechanics the study of human movement and the effect of force and motion in sport 7 of 28 what is force push or pull that alters the state of motion of the body 8 of 28 how do you calculate force mass x acceleration (measured in newtons) 9 of 28 what is inertia resistance of a body to change its state of motion 10 of 28 whaat is velocity the rate of change in displacement 11 of 28 how do you calculate velocity displacement / time (measured in metres per second) 12 of 28 what is momentum the quality of motion possessed by a moving body 13 of 28 how do you calculate momentum mass x velocity (measured in kilograms per second) 14 of 28 what is acceleration rate of change in velocity 15 of 28 how do you calculate acceleration (final velocity - initial velocity) / time ( measured in metres per second squared) 16 of 28 what is an external force orginate from outside the boday 17 of 28 what are the 2 verticle forces weight - acts downwards from the centre of mass reaction - acts upwards from the part of contract with the ground 18 of 28 what are the horizontal forces friction - force that opposes the motion of 2 surfaces in contacts air resistance - force that opposes the motion through the air 19 of 28 what is air resistance force that opposes the motion through the air 20 of 28 what sports a hugely affected by air resisitance F1, cycling, sprinting 21 of 28 how do you decrease air resstance decrease cross sectional area, create arofoil shape, improve surface smoothness, reduce velocity 22 of 28 what is friction force that opposes the motion of 2 surfaces in contacts 23 of 28 whta re the factors affecting friction roughness of ground surface, roughness of contact surface, temperature, size of normal reaction 24 of 28 what is limb kinematics the study of the movement of limbs in space and time taken to carry out movement 25 of 28 how is limb kinematics carried out 1) reflection markers placed on performer 2) then filmed using mulitiple cmaeras 3) data is turned into digital fromat for analysis 26 of 28 what are the positives of limb kinematics data can be used be immeditaly analysised / coaches can improve techniques / exame causes of injury / investigate impact of equipment 27 of 28 what are the negatives of limmbs kinematics expensive / lab makes some techiques difficult to perform / results dont take into account individual differneces 28 of 28
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