In uniform circular motion, which of the following quantities
are constant?
a.) the tangential component of acceleration
b.) the radial component of acceleration
c.) speed
d.) instantaneous velocity
e.) the tangential component of velocity
Which of these quantities are zero throughout the motion?
a.) speed
b.) the tangential component of velocity
c.) the radial component of acceleration
d.) instantaneous velocity
e.) the tangential component of acceleration
An electron undergoes an oscillatory circular motion in the xy
plane, dictated by a uniform constant magnetic field
B applied in the z direction, and by a circularly
polarized electromagnetic wave that propagates in the z direction.
The electric field of the wave is given by E =
Eo[cos(kz - wt)x - sin(kz -
wt)y]. Note that at z=0, where the electron moves,
this electric field is E =
Eo[cos(wt)x +
sin(wt)y].
(a) This part of the problem is classical...
1.1 While a car travels around a circular track at a constant
speed its, which of the following is true?
A) it has non-zero acceleration
B) it has zero acceleration
C) it has zero velocity, because the speed is constant
D) It has zero inertia
1.2. How many of the following statements are impossible?
(a) An object that has zero velocity and a non-zero
acceleration.
(b) An object that travels with a constant velocity and
a varying acceleration.
(c) An...
5. For an object moving in uniform circular motion, does the
centripetal force do work on the object?
A.
No, because the force is always perpendicular to the object's
displacement.
B.
No, because the displacement of the object is zero.
C.
Yes, because the object is moving.
D.
Yes, because work is force times distance and the object is
moving from the force.
6. How can two collisions have the same change in momentum even
though one collision took longer...
A metal loop is being pushed at a constant velocity into a
uniform magnetic field, as shown in the figure, but is only partway
into the field.
As a result of this motion:
a) End a of the resistor R is at a higher potential than end
b.
b) End b of the resistor R is at a higher potential than end
a.
c) Ends a and b are at the same potential.
Which of the following provides an example of one-dimensional
motion in which average speed is not equal to the magnitude of
average velocity?
a. A boy rides a bicycle along a straight path from his house to
the market.
b. A pitcher throws a baseball along a perfectly straight
line.
c. A man throws a ball vertically upwards and catches it when it
falls back.
d. A girl walks 80m north, halts for a while, and walks 100m
further north...
In your own words explain why the force and acceleration vectors
in Uniform Circular Motion point inward. Also discuss the
differences between Centripetal Force and Centrifugal
Force.
4. Suppose a newborn panda bear of mass 98.0 kg is exhibiting
uniform circular motion while
orbiting a neutron star of mass 1.50*10^21 kg and radius
3.50*10^5 m. The distance that the
bear maintains from the surface of the neutron star is 50:0 km.
What is the magnitude of the
baby panda's tangential velocity?
1.)How would you describe the motion of the pendulum?
a.)Rotational Motion
b.)Linear motion
c.)Oscillatory Motion
2.)What is the shape of the graph of position versus time for the
pendulum?
a.)Exponential
b.)Sine Wave
c.)Circular
d.)Tangential
3.)What is the shape of the graph for position versus time for the
spring?
a.)Circular
b.)Exponential
c.)Sine Wave
d.)Tangential
4.)What were the variables that were changed for the
experiment?
a.)Velocity of the weight
b.)Temperature of the room
c.)Mass of the weight
d.)length of the pendulum
5.)Which...