Question

an object swings at the ene if a string in uniform circular
motion. which of the following changes would not cause an increased
centrioetal force

invreasing the angular speed if a rotating body will not cause an increase in

Answer #1

The centripetal acceleration is given by

Where m is the mass of object, v is the linear speed of object and r is the radius of the circle or length of string.

this means for F to increase we need larger mass, greater linear speed and shorter string.

A large string would results decrease in centripetal acceleration.

Increasing the angular speed of a rotating body will not cause an increase in Moment of inertia because it depends on mass of object and distance from rotation axis. It does not depend on angular speed.

The centripetal force acting on an object undergoing uniform
circular motion is the net force acting on the object. In this
experiment, the centripetal force is due to tension in the string.
In other scenarios, what forces can provide the centripetal force?
Describe at least two scenarios of uniform circular motion and name
the centripetal force in each. The best answers will be different
from the ones given in the Introduction.

If the speed of an object in uniform circular motion is tripled,
the magnitude of the centripetal acceleration increases by a factor
of :
A. 2
B. 3
C. 9
D. 6
E. 8

For an object in uniform circular motion, a centripetal
force (acceleration) is required.
a) True
b) False

The acceleration of an object in a uniform circular motion is
bigger in magnitude if the object ____.
A,B,C,D are yes or no answers!!
a) moves at the same speed around a smaller circle?
Yes/No
b) moves faster around the same circle?
Yes/No
c) has a bigger mass but moves at the same speed around the same
circle?
Yes/No
d) moves at twice the speed around a circle that is twice as big
in radius?
Yes/No

A rock on a string undergoes uniform circular motion at a
constant radius and with period T (i.e., it makes one complete
revolution around the circle in time T). As a result, the magnitude
of the centripetal acceleration of the object is a c.
Suppose now the motion is changed so that the period is T/2 but the
radius is the same. What will be the new magnitude of the
centripetal acceleration
ac/2
2ac
4ac

For an object in uniform circular motion, be able to describe
how the acceleration of that object depends on the velocity of the
object and the radius of the circular path.
Please explain in simplest terms and give an example using units
given.

An object is in uniform circular motion with a centripetal
acceleration a=4.3 m/s2 . If the period of the circular motion is
T=1.8 s, what is the radius of the circle?
0.56 m
0.71 m
0.14 m
0.35 m
0.46 m

Question 1
The study of Uniform Circular Motion relates to objects
traveling with constant speed around a circle with radius, R. Since
the object has a constant speed along a circular path, we can also
say that
A)
the object has zero velocity.
B)
the object has a constant acceleration magnitude.
C)
the object has zero acceleration.
D)
the object has a constant velocity.
E)
the object has an increasing acceleration.
Question 2
Uniform Circular Motion (UCM) problems are just...

Is it possible for an object in uniform circular motion to have
nonzero tangential yet zero centripetal acceleration? explain

1. Which of the following is true for angular motion?
a. A uniform net torque always causes an increase in angular
speed.
b. A uniform net torque always changes the direction of the angular
displacement vector.
c. A uniform net torque always change the magnitude of the
rotational inertia.
d. A uniform net torque will always cause a change of angular
momentum.
2. A net (non-zero) force acts on a particle. Which of the
following does not have to be...

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