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Physics
Name
Mass vs. Weight
Block
Date
Deep, deep, outer space:
15) If you had a big, giant rock in deep, deep, outer space…
a) Would it have mass? Explain.
1) What is the common term for gravitational force (Fg)?
2) What units are commonly used in America to measure weight?
3) What units are used in the metric system to measure weight?
4) In the metric system…
a) What equation do we use to calculate weight?
b) How much would it weigh? Explain.
18) A 90 kg astronaut in deep outer space (away from gravitational or frictional forces) throws a 5 kg rock.
a) The rock will…
b) What units does this equation give us?
b) How much force is required to keep the object moving?
c) What do these units combine to make?
c) The rock’s tendency to do this is called…
5) If my crazy cousin Paco weighs 780 N here on Earth, what is his mass?
6) What is Paco’s weight in pounds?
7) If a rock weighs 24 N on the Moon, where g = 1.6 m/s2, what is the rock’s mass?
8) Even though this is completely theoretical because Jupiter is a gaseous planet and doesn’t really have a surface, IF a
10 kg object weighs 248 N on the surface of Jupiter, what is the acceleration due to gravity on Jupiter?
d) Which weighs more, the astronaut or the rock? Explain.
e) Which has more mass, the astronaut or the rock? Explain.
19) The drawing below shows Larry the demonstration ball being swung around at the end of a string in a clockwise
direction at a steady rate in deep, deep outer space…
B
a) How much does Larry weigh?
A
C
9) You have about 1/6 your weight on Earth when on the moon, how much would you weigh, in pounds, on the Moon?
b) Which path will Larry follow if the string breaks? Why?
10) On Jupiter you have about 2.5 times your weight on Earth, how much would you weigh, in pounds, on Jupiter?
11) What is your mass? Will this value change if you go to the moon, or Jupiter or deep, deep outer space? Explain.
c) Before the string breaks, is Larry moving with constant speed, constant
velocity or both? Explain.
12) What does it mean for a physics type to say that mass is more fundamental than weight?
d) After the string breaks, is Larry moving with constant speed, constant velocity or both? Explain.
13) How are mass and weight different?
14) How are mass and weight similar?
e) Is Larry accelerating as he is being swung in a circle? Explain.
f)
Is Larry accelerating after the string breaks? Explain.
D