Basic Sports Science

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Basic Sports Science - Quiz 6

Biomechanics

In linear motion

1 point

All parts of the body move at the same velocity

The body moves in a straight line

The body moves in along a curved path

Clear selection

In curvilinear motion

1 point

All parts of the body move at the same velocity

The body moves in a straight line

The body moves in along a curved path

Clear selection

In rectilinear motion

1 point

All parts of the body move at the same velocity

The body moves in a straight line

The body moves in along a curved path

Clear selection

In radial motion

1 point

All parts of the moving body move at the same speed

Parts of the moving body away from the axis move faster than those closest to the centre

Clear selection

In linear motion

1 point

All parts of the moving body move at the same speed

Parts of the moving body away from the axis move faster than those closest to the centre

Clear selection

Newton's 1st Law of Motion (Law of Inertia) states

1 point

A body in motion will stay in motion unless disrupted by a force

A body at rest will stay at rest unless disrupted by a force

Both answers are correct

Clear selection

Newton's 2nd Law of Motion (Law of Inertia) can be written as

1 point

Force (F) = mass (m) x acceleration (a)

Energy (E) = mass (m) x acceleration (a)

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Newton's 3rd Law of Motion (Law of Interaction) states

1 point

A force exerted on one body on another will lead to a greater force being exerted by the other body on the first body

For every force that is exerted by one body on another, there is an equal and opposite force exerted by the second body on the first.

Clear selection

When a tennis player hits a ball, the more force used will lead the ball being hit with more velocity. This is an example of

1 point

Newton's First Law of Motion

Newton's Second Law of Motion

Newton't Third Law of Motion

Clear selection

A weight lifter poor bench press form has caused an injury to his elbows with each lift causing pain as he lifts. This is an example of

1 point

Newton's First Law of Motion

Newton's Second Law of Motion

Newton't Third Law of Motion

Clear selection

A gymnast after a long jump takes about 5 meters to stop. This is an example of

1 point

Newton's First Law of Motion

Newton's Second Law of Motion

Newton't Third Law of Motion

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A young soccer player is used to kicking a light ball. When he switches to a heavier ball, he finds that he cannot kick the ball as far. This is an example of

1 point

Newton's First Law of Motion

Newton's Second Law of Motion

Newton't Third Law of Motion

Clear selection

A boxer must protect his hands with gloves during a fight

1 point

Newton's First Law of Motion

Newton's Second Law of Motion

Newton't Third Law of Motion

Clear selection

A person performing a high jump runs and builds up speed and before attempting to jump over the height.

1 point

Newton's First Law of Motion

Newton's Second Law of Motion

Newton't Third Law of Motion

Both the First and Third Laws of Motion

Clear selection

An object is thrown 3 m into the air and falls back to where it was thrown. The distance moved by the object was

1 point

0 m

3 m

6 m

Clear selection

An object is thrown 3 m into the air and falls back to where it was thrown. The displacement of the object was

1 point

0 m

3 m

6 m

Clear selection

An object is thrown 3 m into the air and falls back to where it was thrown. The object was in the air for 1 second as it moved upwards and then in the air for 1 second as it fell back. The average speed of the object as it moved vertically was

1 point

0 m/s

3 m/s

6 m/s

Clear selection

1 point

0 m/s

3 m/s

6 m/s

Clear selection

1 point

0 m/s

3 m/s

6 m/s

Clear selection

1 point

0 m/s

3 m/s

6 m/s

Clear selection

Which of the following is the best measure of the "efficiency" of a sportsman in an activity?

1 point

Velocity and displacement

Speed and distance

Clear selection

Which of the following are examples of a radius of rotation?

1 point

A table tennis player swings his paddle over an angle of 135 degrees

A footballer kicks the ball by starting the kick behind is body and with the leg moving over an angle of 0.7 radians

Both are correct

Clear selection

A footballer's legs are 0.6 m long from outstretched toe to hip. Where is the centre of movement when he kicks a ball?

1 point

The hip

The toe

Clear selection

A footballer's legs are 0.6 m long from outstretched toe to hip. What is the radius of rotation?

1 point

0 m

0.6 m

Clear selection

A footballer's legs are 0.6 m long from outstretched toe. He kicks the ball by starting the kick behind is body and with the leg moving over an angle of 0.7 radians. What equation should be used to calculate the arc length of the foot?

1 point

Angular length = radius (0.6 m) x Angular displacement (0.7 radians)

Angular length = 0 as the hip is at the centre of the motion

Clear selection

A footballer's legs are 0.6 m long from outstretched toe. He kicks the ball by starting the kick behind is body and with the leg moving over an angle of 0.7 radians. The kick takes 0.5 seconds. What equation should be used to calculate the linear velocity of the the foot?

1 point

Linear velocity = radius (0.6 m) x Angular displacement (0.7 radians)/time (0.5 seconds).

Liniear velocity = 0 as the hip is at the centre of the motion

Clear selection

A golf stick is 1 m long. The golfer's arm holding the golf stick is 0.6 m long. The value of the radius as used for calculating angular velocity would be.. (Hint - The centre of force starts at the shoulder)

1 point

0.6 m

1.0 m

1.6 m

Clear selection

A golf stick is 1 m long. The golfer's arm holding the golf stick is 0.6 m long. The club moved through an angle of 0.5 radians. The distance moved by the golf club would be.. (Hint: d = r x angle)

1 point

0.3 m

0.5 m

0.8 m

Clear selection

A golf stick is 1 m long. The golfer's arm holding the golf stick is 0.6 m long. The club moved through an angle of 0.5 radians over a period of 1 second. The angular velocity of the golf club would be... (Hint angular velocity = radians/time)

1 point

0.5 radians/second

1 radians/second

1.6 radians/second

Clear selection

A golf stick is 1 m long. The golfer's arm holding the golf stick is 0.6 m long. The club moved through an angle of 0.5 radians over a period of 1 second. The linear velocity of the golf club would be. (Hint: Velocity = radius x angular velocity).

1 point

0.8 meters /second

1 meter /second

1.6 meters/second

Clear selection

What factors determine the height and range of a projectile?

1 point

Angle of release

Radius of release

Mass of object

Radial velocity

Force of release

All of the above

Clear selection

Which angle will give the longest range for a projectile

1 point

0 degrees

45 degrees

90 degrees

Clear selection

Which angle will give the highest height for a projectile

1 point

0 degrees

45 degrees

90 degrees

Clear selection

Which of the following equations explains why a heavier object will be thrown a shorter distance than a lighter object with the same amount of force?

1 point

A (acceleration) = F (force)/ m (mass)

D (distance) = Speed x time

Clear selection

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