Inner Planets Outer Planets
Mercury
Venus
Earth
Mars
-Closest to Sun Planet
.3" Planet .4 Planet
- Smallest Planet Hottest Planet Life
• Red Soil
-Cratered
- Longest Day • Water Covers Biggest Volcano
- Rocky Surface
Rocky Surface • Rocky Surface
• Biggest Valley
• Rocky Surface
Jupiter
Saturn
Uranus Neptune
Sº from Sun •6 from Sun .7 from Sun .8 from Sun
• Largest Planet •2 Largest Planet Rotates Sideways Small Rings
• Red Spot Storm Largest Rings • Rings Vertical • Gas Giant
Most Moons • Many moons Gas Giant
Small Rings • Gas Giant
• Gas Giant
What limitations does the model have?

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

It is either a  proton or a neutron im almost positive. hope this .