Transcript 1.2 (Unit.Section) Title - White Plains Public Schools

7.3 Apparent Weight and Circular
Motion Practice
SWBAT identify different types of
centripetal forces and calculate their
value.
1)
ac
Fc
2) 1.5 m/s2
3) 2.5 m/s
4) 11 m/s
v
5) 40 N
6) 29.6 kg, tension
7) 40 m, friction
Is it possible to make “artificial gravity” in a
space ship or space station? Why or why not?
(Hint: Consider what you have learned about
circular motion, centripetal force, and
centrifugal force)
What kind of force is acting as the centripetal force?
A 75 kg astronaut is in a spinning space station that has
a radius of 100m. His apparent weight is 400N.
a) What is the normal force acting on the astronaut?
b) What is the centripetal force acting on the astronaut?
c) What is the centripetal acceleration of the space station?
d) How does his apparent weight compare to his weight on
Earth? Should the space station speed up or slow down to
achieve a more accurate artificial gravity?
A 85 kg astronaut is in a spinning space station that has
a radius of only 25 m. How fast should the space
station spin so that his apparent weight matches his
weight on Earth?
a)
b)
c)
d)
e)
What is weight on Earth?
What should the normal force (centripetal force) be?
What should the centripetal acceleration be?
What should the velocity be?
How long would it take for the space station to rotate once?