Physics Final Exam Review 2 Question Preview (ID: 9955)


This Is A Review Of All Physics Topics Taught Over A School Year. TEACHERS: click here for quick copy question ID numbers.

A 4.0kg ball is moving at 6.0m/s directly toward a 2.0kg ball which is at rest. They collide and stick together. What is the velocity after the collison? vf=(m1v1+m2v2)/(m1+m2)
a) 4 m/s
b) 4.3 m/s
c) 3 m/s
d) 3.3 m/s

You are on a roller coaster and you are momentarily lifted out of your seat when dropped at the top of a very high hill. You feel weightless because
a) there is no gravity at that height.
b) you are in free fall as your chair drops suddenly.
c) you are not accelerating at that point.
d) the pull of the sun balances out the pull of the Earth at that height.

A student lifts her 42kg body 0.25meters in 2seconds. How much power is she exerting? (weight=mass x gravity) (P=Fd/t)
a) 10.5 watts
b) 102.9 watts
c) 51.5 watts
d) 21 watts

A positive charge attracts object X. A negative charge repels object Y. Object X is attracted to object Y. (alternation of positive and negative charges)
a) Object X has a positive charge. Object Y has a negative charge.
b) Object X has a negative charge. Object Y has a positive charge.
c) Object X has a positive charge. Object Y has a positive charge.
d) Object X has a neutral charge. Object Y has a negative charge.

Demonstrate your knowledge of Coulomb's law if Q1 is 1.6 x 10^-13 C, Q2 is 1.6 x 10^-13 C, and d is 0.50 m (k = 9x10^9 N/m^2/C^2) (F=k•Q1•Q2/d^2)
a) 9.2 x 10^-16 N
b) 0.0827 N
c) 1.024 x 10^-25 N
d) 0.704 N

A negative point charge placed at point A will move toward the right.
a) The electric field is strongest nearest point B.
b) A negative point charge placed at point A will move toward the right.
c) The charges on both B and C are positive.
d) A negative point charge placed at point A will move toward the left.

Suppose the value of one resistor is 40 ohms, and the value of the second resistor is 10 ohms. What is the equivalent resistance? Req = (R x R) / (R + R)
a) 50 ohms
b) 8 ohms
c) 30 ohms
d) .125 ohms

A circuit has a resistance of 2.0 ohms and a 24 V battery. What is the current?
a) 12 A
b) 4.0 A
c) 2.0 A
d) 0.50 A

The lines of magnetic field from a bar magnet for closed lines. By convention, the field direction is taken to be
a) inward from the north pole and outward to the south pole.
b) inward from the north pole and inward from the south pole.
c) outward from the north pole and inward to the south pole
d) outward from the north pole and outward to the south pole.

Which is not a way to make an electromagnet stronger?
a) changing the number of coils of wire
b) changing the current in the wire
c) changing the material used for the core
d) using a thicker wire

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