Question

Gravity is the only force acting on an apple as it falls from a tree.
(5 points)
• True
False

What would happen to your weight on the moon?
(5 points)
decrease
increase
stay the same
What would happen to your mass on the moon?
(5 points)
stay the same
O decrease
• increase
Which object would have the highest gravitational attraction? (5 points)
feather
bicycle
compact car
semi truck

As a spaceship travels from Earth to the moon, which value never changes?
(5 points)
mass
velocity
• weight
O acceleration
Gravity is a force that is always: (5 points)
• attractive
• repulsive
Two objects on Earth with the same weight must have the same: (5 points)
• Velocity
• Acceleration
• Density
• Mass
What would happen to your weight if the force of gravity increases? (5 points)
• Your weight would increase.
• Your weight would stay the same
• Your weight would decrease.

Answer 1

1. Gravity is the only force acting on an apple as it falls from a tree.
Answer: False — air resistance also acts on the falling apple.

2. What would happen to your weight on the moon?
Answer: decrease — moon’s gravity is weaker (~1/6), so weight (force) is less.

3. What would happen to your mass on the moon?
Answer: stay the same — mass is intrinsic and doesn’t change with location.

4. Which object would have the highest gravitational attraction?
Answer: semi truck — gravitational attraction is proportional to mass; the truck has the largest mass.

5. As a spaceship travels from Earth to the moon, which value never changes?
Answer: mass — mass is constant; weight, velocity and acceleration can change.

6. Gravity is a force that is always:
Answer: attractive — gravity always pulls masses together.

7. Two objects on Earth with the same weight must have the same:
Answer: Mass — on Earth weight = mass × g (same g), so equal weight ⇒ equal mass.

8. What would happen to your weight if the force of gravity increases?
Answer: Your weight would increase.