Quiz 1 — Physics & Orbits

Newton's first law states that an object in motion in space will:

According to Newton's second law, F equals:

Newton's third law is best expressed as:

Gravity between two masses is proportional to:

Gravity between two masses varies with distance as:

The escape velocity from Earth's surface is approximately:

Escape velocity depends on:

Microgravity in orbit is caused by:

Astronauts on the ISS float because they are:

A satellite's orbital speed increases when the orbit is:

Circular orbits have:

Elliptical orbits are described by:

The point in an elliptical orbit closest to Earth is called:

The farthest point from Earth in an elliptical orbit is called:

A geostationary orbit has an altitude of about:

A geostationary satellite orbits:

A polar orbit passes over:

Sun-synchronous orbits are useful because they:

A Hohmann transfer orbit is used to:

Kepler's third law relates:

The centripetal force keeping a satellite in orbit is provided by:

Weightlessness is another term for:

The value of 'g' at Earth's surface is approximately:

Which planet has the strongest surface gravity?

A geosynchronous but not geostationary orbit:

Which orbit is best for Earth-observation weather satellites needing wide global coverage?

Which orbit is best for continuous coverage of one region?

An object launched at more than escape velocity will:

Orbital velocity of the ISS is about:

The ISS orbits Earth roughly every:

Microgravity affects the human body by:

In space, fluids in the body:

Which is NOT a Newtonian concept?

A rocket accelerates due to:

Delta-v refers to:

Which mission concept uses gravity assist?

An orbit's eccentricity of 0 means it is:

Which force is negligible in the vacuum of deep space?

If Earth's mass doubled, escape velocity would:

The centre of mass of the Earth-Moon system is called the: