Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PE A level (OCR) (from spec) > Paper 1: 03 Biomechanics > Flashcards

Paper 1: 03 Biomechanics Flashcards

1
Q

What is linear motion?

A

Movement of a body in a straight or curved line, where all parts move the same distance, in the same direction over the same time.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is direct force?

A

A force applied through the centre of mass resulting in linear motion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is centre of mass?

A

The point at which a body is balanced in all directions. The point at which a weight appears to act.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is distance?

A

The total length covered from start to finish positions (m) .

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is displacement?

A

The shortest straight-line route from start to finish positions (m) .

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is speed?

A

The rate of change in distance (m/s) calculated using distance/ time.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is velocity?

A

The rate of change in displacement (m/s) calculated using displacement/time.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is momentum?

A

The quantity of motion possessed by a moving body. Momentum (kgm/s) = mass X velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is acceleration ?

A

The rate of change in velocity. Acceleration (m/s/s) = final velocity - initial velocity /time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is deceleration ?

A

The rate of change (decrease/negative) in velocity. Deceleration (m/s/s) = final velocity - initial velocity/ time .

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is inertia ?

A

The resistance of a body to change its state of motion, weather at rest or moving.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is force?

A

A push or pull that alters the state of motion of a body.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is meant by balanced forces ?

A

These occur when 2 or more forces acting on a body are equal in size and opposite in direction. Net force = 0, the body will remain at rest or in motion with constant velocity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is meant by unbalanced forces?

A

These occur when 2 or more forces acting on a body are unequal in size and opposite in direction. Net force will be present and the body will change its state of motion, either accelerating or decelerating.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is net force?

A

The sum of all forces acting on a body, also termed resultant force on a body when all individuals forces have been considered.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a distance time graph?

A

A visual representation of the distance traveled plotted against the time taken.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is a gradient?

A

The slope of a graph at a particular moment in time. Gradient = change in y axis / change in x axis.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is a speed/time graph ?

A

A visual representation of the speed of motion plotted against the time taken.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is Velocity / Time graph ?

A

A visual Representation of the velocity of motion plotted against the time taken.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is Angular motion?

A

Movement of a body or part of a body in a circular path about an axis of rotation.

21
Q

What is an eccentric force?

A

A force applied outside the centre of mass, resulting in angular motion.

22
Q

What is torque?

A

A measure of the turning (eccentric) force applied to a body.

23
Q

What is principle axis of rotation?

A

An imaginary line that passes through the centre of mass which a body rotates: Longitudinal, transverse and frontal axis.

24
Q

What is a radian?

A

A unit of measurement of the angle through which a body rotates. 1 radian = 57.3 degrees.

25
Q

What is angular velocity?

A

The rate of change in angular displacement measured in radians per second (Rad/s) (rate of spin).

26
Q

What is moment of inertia?

A

The resistance of a body to change its state of angular motion or rotation. (Kgm^2)

27
Q

What is angular momentum? (And Calculation)

A

The quantity of angular motion possessed by a body. Moment of inertia X angular velocity (Kgm^2Rad/s)

28
Q

What is conservation of angular momentum?

A

Angular momentum is a conserved quantity which remains constant unless an external eccentric force or torque is applied.

29
Q

Angular analogue of newtons first law of motion?

A

The angular equivalent of newtons first law of motion, which states: a rotating body will continue to turn around its axis of rotation with constant angular momentum unless acted upon by an eccentric or external torque.

30
Q

What is air resistance?

A

The force that opposes the direction of motion of a body through the air.

31
Q

What is drag?

A

The force that opposes the direction of motion of a body through the water.

32
Q

What is streamlining?

A

The creation of smooth air flow around an aerodynamic shape.

33
Q

What is an aerofoil?

A

A streamlined shape with a curved upper surface and flat lower surface designed to give an additional lift force to a body.

34
Q

What is projectile motion?

A

Movement of a body through the air following a curved flight path under the force of gravity.

35
Q

What is a projectile?

A

A body that is launched into the air losing contact with the ground surface, such as a discus or long jumper.

36
Q

What is a parabola?

A

A uniform curve symmetrical about its highest point.

37
Q

What is a parabolic flight path?

A

A flight path symmetrical about its highest point caused by the dominant weight force of a projectile.

38
Q

What is a non-parabolic flight path?

A

A flight path asymmetrical about its highest point caused by the dominant force of air resistance of the projectile.

39
Q

What is a free body diagram ?

A

A clearly labelled sketch showing all of the forces acting on a body at a particular instant in time.

40
Q

What is a parallelogram of forces?

A

A parallelogram illustrating the theory that a diagonal drawn from the point where are forces represented in size and direction shows the resultant force acting.

41
Q

What is a resultant force?

A

The sum of all forces acting on a body or the net force acting on the projectile.

42
Q

What is the Bernoulli principle ?

A

Creation of an additional lift force on a projectile in flight resulting from Bernoulli’s conclusion that the higher the velocity of air flow, the lower the surrounding pressure.

43
Q

What is a lift force?

A

An additional force created by a pressure gradient forming on opposite surfaces of an aerofoil moving through a fluid.

44
Q

What is meant by angle of attack?

A

The most favourable angle of release for a projectile to optimise lift force due to the Bernoulli principle.

45
Q

What is the Magnus effect?

A

A creation of an additional magnus force on a spinning projectile which deviates from the flight path.

46
Q

What is a magnus force?

A

A force created from a pressure gradient on opposing surfaces of a spinning body moving through the air.

47
Q

What is a hook?

A

A type of sidespin used to deviate a projectiles flight path to the left.

48
Q

What is a slice?

A

A type of sidespin used to deviate a projectiles flight path to the right.

49
Q

What is optimal angle of release?

A

17 Degrees for aerofoil.
45 Degrees when height of release is equal to the height of landing.
<45 when height of release is higher then height of landing.

PE A level (OCR) (from spec) (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions