7. In order to swing a 0.1-kg.mass tied to one end of a cord in a horizontal circle of radius 0.5 m so that its tangential speed is 0.2 m/s, what cen- tripetal force must you exert on the mass through the cord? 8. Calculate the gravitational force of attraction. between a mass of 50 kg and a mass of 60 kg when they are 2.0 m apart.
7. In order to swing a 0.1-kg.mass tied to one end of a cord in a horizontal circle of radius 0.5 m so that its tangential speed is 0.2 m/s, what cen- tripetal force must you exert on the mass through the cord? 8. Calculate the gravitational force of attraction. between a mass of 50 kg and a mass of 60 kg when they are 2.0 m apart.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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please answer 7 and 8. ??
Transcribed Image Text:LAR MOTION, KEPLER'S LAWS,
NEWTON'S LAW OF UNIVERSAL GRAVITATION
*Show all work on a separate sheet.
1. A student swings a mass of 0.120 kg tied to one.
end of a cord in a horizontal circle of radius 1.00
m so that its tangential speed is 2.00 m/s. What
is the centripetal force acting on the massi
2. What centripetal force is needed to keep a 2-kg
mass moving at a constant speed of 4 m/s in a
circle having a radius of (a) 4 m; (b) 8 m?
J
3. An auto having a mass of 1500 kg makes a turn
on a banked circular track of radius 200 m at a
speed of 20 m/s. What centripetal force does the.
track exert on the auto?
4. The moon has a period of 27.3 days and a mean
Distance of 3.90 x 105 km from the center of
Earth. Use Kepler's Third law to find the period
of a satellite in orbit 6.70 x 10³ km from the
center of Earth. Express your answer in minutes.
10. A 450-gram ball attached to bl
5. Achild having a mass of 30 kg sits 4.0'm from
the center of a merry-go-round that is rotating
with a period of 10 s. What is the centripetal
force acting upon the child?
1
6. What centripetal force is needed to keep a mass
of 2,0 kg moving on a smooth floor in a circular
path of radius 0.50 m and making one revolution,
every 4 s?
7. In order to swing a 0.1-kg.mass tied to one end
of a cord in a horizontal circle of radius 0.5 m
So that its tangential speed is 0.2 m/s, what cen-
tripetal force must you exert on the mass through
the cord?
8. Calculate the gravitational force of attraction
between a mass of 50 kg and a mass of 60 kg.
when they are 2.0 m apart.
9. A student attaches a mass of 0.5 kg to one end of
a rope. The student then swings the mass in a
horizontal circle having a radius of 1 m so that its
tangential speed is 4 m/s. What centripetal force,
must be exerted on the mass to keep it moving in
a circle?
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