Question

Question 26
Why do you weigh less on the moon than on Earth?



a
Moon has more mass and therefore less gravity
b
Moon has less mass and therefore more gravity
c
Moon has less mass and therefore less gravity
d
Moon has more mass and therefore more gravity
Question 27
Which object has a greater amount of potential energy if the two balls are dropped from the same height: a ping pong ball that with a mass of 0.010 kg, or a basketball with a mass of 1.5 kg.

a
basketball ball
b
ping pong ball
Question 28
How could you increase the strength of an electromagnet? (Select all that apply)

a
Increase the current flowing through the coils
b
Increase the number of coils
c
Decrease the number of coils
d
Decrease the current flowing through the coils
Question 29
When two North Poles of a magnet are held together, they will:

a
Repel
b
Attract
c
They will not do anything

Answer 1

26 — c: Moon has less mass and therefore less gravity (so you weigh less there).

27 — a: basketball (PE = mgh, same height so larger mass = greater potential energy).

28 — a and b: Increase the current and increase the number of coils both increase an electromagnet’s strength.

29 — a: Repel (like magnetic poles repel).