# Dimensions: Physics Question

#### Inquiring_Mike

I've been having trouble with these questions, I would greatly appreciate it if anyone could help to explain them to me.
Question:
Explain how many dimensions the following motion is taking place in.
- a motocross racer rides around a hilly track
- a curler shoots a rock down the ice, around a guard, and onto a button
- a hockey player passes the puck along the ice
- a golfer hits a slice into the woods
- a train travels along a straight section of a track

Related Introductory Physics Homework Help News on Phys.org

#### HallsofIvy

Homework Helper
Anything that occurs on a single straight line is
1 dimensional, anything that occurs in a plane, but not a single straight line is 2 dimensional, any thing that occurs in a volume (not a single plane) is 3 dimensional.

Does the motorcylist ride in a straight line? Does he stay in a plane (on a flat surface)? What dimension are we talking about then?

A curler does not shoot the stone in a straight line (the problem said it goes around a guard) but does stay on the ice. What dimension is that?

A hockey player passes the puck along the ice. That sounds like a single plane. Does the puck curve or change direction?

Do you know what a slice is? That should give you the answer.

A train moving along a STRAIGHT section of track. Well, that was a give-away!

#### Loren Booda

Don't forget the dimension of time (and brane dimensions as well!)

#### Tom Mattson

Staff Emeritus
Gold Member
Originally posted by Loren Booda
Don't forget the dimension of time (and brane dimensions as well!)
This is the "Grade K-12 Forum", professor!

#### FZ+

He could get extra credit...

(Or lose a mark because the teacher doesn't understand...)

#### Inquiring_Mike

Thanks everyone for the help!

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving