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Quiz #5 - Team Sports
| 1. Why do football
players wear black paint under their eyes? |
| a)
To make them look tougher |
| b)
To protect their cheek bones |
| c)
To help them see better |
| d)
To make the helmets fit better |
Answer is C: Football players wear eye black
to help them see. They have to contend with bright sunlight
or stadium lights that can make it awfully hard for them to
see the ball when it is up in the air. They wear the eye black
because it absorbs light and reduces glare which improves
their vision on the field.
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|
| 2. Why do volleyball
players jump up as they serve the ball? |
| a) To give them
a better angle for getting the ball into the court without
having it go to high up over the net |
| b) To give them
more power so they can hit the ball as hard as possible |
| c) To give them
more height so they can spike the ball when it comes back
over the net |
| d) To give the
ball more speed so it will be harder for the other team
to return |
Answer is A: When serving, volleyball players
want to hit the ball as hard as possible with the least arc,
while still clearing the net. In order to get it over the
net but still have it land in the court, they need to hit
it at an angle. If they stand while serving they have to be
very precise and hit the ball at just the right upward angle.
If they jump up while they serve, they don't have to hit it
at such a sharp angle. If they jump up high enough, they can
even hit the ball straight ahead or downward and it will still
go over the net.
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|
| 3. In the past,
when baseball players have wanted to cheat, they heated
up the baseballs. Why? |
| a) Heated balls
are easier to pitch |
| b) Heated balls
are harder to catch |
| c) Heated balls
don't fly as far when hit |
| d) Heated balls
fly even farther when hit |
Answer is D: The core of a baseball is made of rubber. When
rubber is heated, it bounces more. So, when a heated baseball
is hit with a bat, it will bounce off with more energy and fly
even farther. |
|
| 4. How does a hockey
player load his stick? |
| a) He raises
it up in the air before bringing it down to hit the puck |
| b) He puts wax
on it before the game begins |
| c) He puts tape
on the handle so it is easier to hold |
| d) He slides
it on the ice before the game begins to get it wet |
Answer is A: A player can load the stick by raising it up in
the air and applying pressure by pushing the lower hand against
the shaft and holding the upper end of the stick close to the
body. This technique causes the stick to bend a little which
loads it with potential energy. When the stick comes contact
with the puck, it hits it with all of the player's strength
plus all of the loaded energy. |
|
| 5. What scientific
principle determines the bounciness of a ball such as
a basketball or baseball? |
| a)
Center of Percussion |
| b)
Coefficient of Restitution |
| c)
Conservation of Angular Momentum |
| d)
Aerodynamics |
Answer is B: Coefficient of restitution is defined as the ability
of an object (in this case, the ball) to rebound after a collision
with a hard object (such as a bat or the ground). |
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