Question

1. choose all that apply.

choose two things that would happen if you lived on a planet with gravity greater than earth’s.
you would be taller as gravity has less effect on your body.
your weight would be less.
your weight would be greater.
gravity would press down on you, making your body shorter.

1. choose all that apply.

choose three reasons why a satellite must be launched to a certain height, angle, and speed.
the rocket must impart enough sideways motion to keep the satellite from falling back to earth.
a rocket must boost a satellite high enough to avoid or limit air friction.
the higher a satellite is, the less earth’s gravitational attraction pulls against it.
a satellite can only enter a stable orbit if traveling directly above the equator.
temperature extremes have less effect at high speeds and higher above earth.

Explanation:

Question 9:

To determine what happens on a planet with greater gravity than Earth:

• Weight is \( W = mg \) (mass \( m \), gravity \( g \)). Greater \( g \) means greater weight (so "Your weight would be greater" applies, "Your weight would be less" does not).
• Higher gravity compresses the body (gravity presses down, making you shorter, so "Gravity would press down on you, making your body shorter" applies).
• Less gravity allows taller growth; greater gravity restricts height, so "You would be taller as gravity has less effect on your body" does not apply.

Reasons for satellite launch conditions:

• Sideways motion: Satellites need horizontal (sideways) speed to orbit (avoid falling back), so "The rocket must impart enough sideways motion to keep the satellite from falling back to Earth" applies.
• Air friction: Launching high reduces air friction (rocket boosts satellite high to limit air friction), so "A rocket must boost a satellite high enough to avoid or limit air friction" applies.
• Gravitational attraction: Higher altitude reduces Earth’s gravitational pull (less attraction), so "The higher a satellite is, the less Earth’s gravitational attraction pulls against it" applies.
• "A satellite can only enter a stable orbit if traveling directly above the equator" is false (orbits can be polar/inclined).
• "Temperature extremes have less effect at high speeds and higher above Earth" is irrelevant to launch height/angle/speed requirements.

Answer:

• Your weight would be greater.
• Gravity would press down on you, making your body shorter.

Question 10: