Question

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

a) True

b) False

Answer #1

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.

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

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

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

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.

1. For an object moving in uniform circular motion, does the
centripetal force do work on the object?
A.
Yes, because work is force times distance and the object is
moving from the force.
B.
No, because the force is always perpendicular to the object's
displacement.
C.
No, because the displacement of the object is zero.
D.
Yes, because the object is moving.
2. An object is moving along a straight line with a speed of v
when it hits...

What happens when an object in uniform motion is released (meaning
no centripetal force is applied)?
a. the object continues to orbit
b. the object falls to the center of the orbit
c. the object flies directly away from the center of the
orbit
d: the object conitnues in the direction of its instantaneous
velocity at the moment of release

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

True or False?
( ) A charge with a velocity perpendicular to a uniform B field
will move in a circular path in a plane perpendicular to the B
field.
( ) A charge with a velocity perpendicular to a uniform B field
will experience a magnetic force of F=qvB
( ) For a mass m to maintain a circular motion on an orbit of
radius r, the needed centripetal force is mv/r.
( ) For a mass m to...

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

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