Transcript Physics Sem. 2 Final Review

Physics Sem. 2 Final Review

What type of charges attract?
a.
Like b. Unlike c. Round d. Square
b.
B.
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Charged objects can attract to neutral
objects? T or F
T
Coulomb’s law states that the force
between two charges is _____ related
to the separation.
 A. Inversely b. inverse squarely
c. Directly d. Parabolically
B.
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The force on two charged particles with
a charge of 1C and are separated by
1m is:
A. 1N B. 9X109N C. 10N C. 1X10-19N
 B


A.
3N
What force would a 1x10-10C charge
experience in a 3x1010N/C electric
field?
3N B. 0.33N C. 3x1020N D. 1N
What is the current in a circuit with a
45 ohm resistor and a 9V battery?
a.
405A b. 54A c. 0.2A d. 0.5A

C
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If a 5, 10 and 15 ohm resistor are
added in parallel, what is the effective
resistance?
2.7 Ohms
A.
How much power is dissipated if a
current of 1.2A is flowing through an
appliance with an applied voltage of
120V?
10W B. 0.1W C. 121.2W D. 144W
B.
D
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With what force F, must a block of
mass 50kg be pulled along a horizontal
surface with a coefficient of friction
equal to .5 to maintain a constant
velocity?
245N
Friction always acts _____ direction of
motion.
A.
In the same B. In the opposite
C. Perpendicular to the
D.
None of the above
E.
B.
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In order to reduce the impact force,
air bags, rubber bumpers, and piles of
hay:_______.
Expand B. Decrease the time of interaction
C. Increase the time of reaction D. Contract
A.
C.

While on Earth, we have weight. If
Earth’s mass suddenly tripled, what
would happen to our weight? It would:

A . Triple
B. Double
C. Be 1/3
D. Be ½

A
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In order to cause a moving object to
pursue a circular path, it is necessary
to apply a(n)_____.

A. Inertial force B. Gravitational force
C. Frictional force D. Centripetal Force E. Centrifugal Force

D.

A
B
C

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Where on the path is the potential
energy the greatest?
A
B
C

A.
C.
What kind of energy does the car
have at point B?
Potential energy B. Kinetic Energy C. Both A &B D. No Energy at all
B
C

a.
If the height of the ride is 20m,
what is the speed at point C?
20m/s b. 196m/s c. 392m/s d. cannot tell
a. 20m/s
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An elastic collision is one in which the
objects:
A. Collide at angles B. Collide at different speeds C. Stick
together D. Bounce off each other
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An elastic collision is one in which the
objects:
A. Collide at angles B. Collide at
different speeds C. Stick together D.
Bounce off each other
D.