Orbits

The name we give to the 'force' we experience when turning a corner in a car is:

• Turning force

• Moment

• Centripetal

• Centrifugal

We experience a centrifugal force because

• of the centripetal acceleration

• we want to keep moving in a straight line

• gravity pulls us towards the side of the car

If we shoot a cannon ball fast enough, with no air resistance, it can...

• Reach the USA

• Reach Europe

• Go into orbit

• Reach the nearest star

An object that orbits a planet is a

• Orbiter

• Satellite

• Planetoid

Why do satellites orbit a planet?

• The force of gravity pulling inwards is always perpendicular to the satellite's velocity

• The centripetal force is always parallel to the satellite's velocity

• The object travels at a very fast angular velocity

The equation for orbital speed is

• 2πd/T

• ΨρφγΦ^2/(κ^3.πλ)

• πr/T

• 2πr/T

The planet with the fastest orbital speed is

• Venus

• Mercury

• Neptune

• Earth

The planet with the slowest orbital speed is

• Neptune

• Uranus

• Saturn

• Pluto

Planets follow ________ orbits

• Circular

• Oblong

• Elliptical

• Triangular

The planet with the most eccentric orbit is

• Neptune

• Mars

• Mercury

• Earth