Free Printable Practice for Physics Final Exam

1.

Given a car traveling 8 m/s heading west. Suppose one of your friends is not certain how speed is different from velocity. Which is the best answer of the four to CLARIFY to your friend?

a)

speed is west velocity is 8 m/s

b)

speed is "8 m/s " without reference to direction. However, velocity is the speed with reference to the direction which is "8 m/s heading west"

c)

speed includes the direction and velocity excludes the direction

2.

Which formula for calculating the force based on Newton's Second Law involving the mass of an object and its acceleration?

a)

$F=\frac{mass}{acceleration}$

b)

$F=mass\ \cdot\ acceleration$

c)

$F=mass\ \cdot\left(acceleration\right)^2$

d)

$F=\frac{acceleration}{mass}$

3.

A block with a mass of 0.08 kilograms is accelerating at $6\ \frac{m}{s^2}$ Calculate the magnitude of force that it is experiencing. Use F = mass x acceleration

a)

480 Newtons

b)

48 Newton

c)

0.48 Newtons

d)

0.048 Newtons

4.

Which of the following is FALSE about UNIFORM CIRCULAR Motion (UCM)?

a)

The direction of the velocity changes.

b)

The accceleration is directed inwards toward the center of the circular path.

c)

The speed (the magnitude of the velocity with NO reference to direction) changes.

d)

The object is accelerating due to the change in the direction of the velocity.

5.

For an objects traveling in a circular path:

Why do objects experience centripetal acceleration even though they can have a constant speed? (Hint: refer to given diagram)

a)

because they are constantly changing direction and hence, velocity changes, and that net change is directed inward.

b)

because they are speeding up as the move in a circle

c)

because they are constantly changing both direction and speed (speed is the numerical value or magnitude of velocity)

d)

because the direction of the force is outward

6.

If an object is spinning around on a string and the string was suddenly cut, the object would move in what type of path?

a)

a jagged path

b)

a curved path

c)

a straight line , tangent to the edge

d)

a straight line, heading towards the center (of the circular path of the string)

7.

When an object is moving in a circle, its LINEAR velocity is called its ____________ velocity. (Hint look at the green vectors)

a)

centripetal

b)

gravitational

c)

centrifugal

d)

tangential

8.

Which of the following depict the acceleration and the tangential velocity of the object traveling in uniform circular motion?

a)

D = acceleration

B = tangential velocity

b)

A = acceleration

C= tangential velocity

c)

A = acceleration

D = tangential velocity

d)

D= acceleration

C= tangential velocity

9.

The velocity is always _______ to the line of a circle.

a)

outwards

b)

tangent

c)

towards the center

d)

perpendicular

10.

What is the formula for centripetal acceleration (points inward) of an object traveling with velocity "v" in a circle of radius "r"?

a)

$a\ =\ vr$

b)

$a=\frac{v^2}{r}$

c)

$a=\frac{v}{r}$

11.

Show work on your paper. Calculate the centripetal force required to make a 5 kg ball move 4 m/s with a radius of 2 m. Use $F=\frac{mv^2}{r}$

a)

10N

b)

20N

c)

30N

d)

40N

12.

Decreasing the radius when making a turn allows you to ___________

a)

increase your friction

b)

change your inertia

c)

maintain a high speed

d)

decrease gravitational pull

13.

Which statement is true about an object that is traveling in UNIFORM circular motion?

a)

The net force on the object is directed toward the center of the circular path.

b)

The speed of the object varies.

c)

The direction of the object's velocity is constant.

d)

The net force on the object is directed away from the center of the circular path.

14.

Suppose the distance of separation between two point charges is tripled. Notice the relationship of the force and the distance in Coulomb's Law. What happens to the strength of the force compared to the original force?

a)

Nine times as much

b)

1/9 times as much

c)

Triple (three times) that of the original force

d)

1/3 as much

15.

The charge of an electron is

a)

neutral

b)

positive

c)

negative

d)

can be either positive or negative

16.

What direction are the electric field lines around a proton?

a)

towards the charge

b)

away from the charge

c)

no movement

d)

back and forth

17.

The law of conservation of charge states that

a)

charge cannot be created or destroyed

b)

all atoms have more protons than electrons

c)

only protons can be removed from an atom

d)

charge cannot be transferred

18.

How does an object have a net postive charge?

a)

It gains protons

b)

it loses electrons

c)

it lose protons

d)

it gains electron

19.

Which two particles are attracted to each other?

a)

A neutron and an electron

b)

Two neutrons

c)

Two protons

d)

A proton and a electron

20.

Which of the following increases the resistance in a circuit?

a)

wider diameter or larger thickness

b)

shorter length

c)

lower temperature

d)

lower conductivity (the material)

21.

The electric field is strongest around a charge when the field lines are

a)

closer together

b)

further apart

c)

in one direction

d)

non-existent

22.

Identify a point at a very WEAK part of the electric field and a point at a very STRONG part of the electric field

a)

very weak: point C

very strong: E

b)

weak: point E

strongest: point D

c)

weak: point D

strong point: B

d)

weak: E

strong: A

23.

Assume a rubber rod is rubbed agains a rabbit fur and gains 5 electrons. Which of the following is true?

a)

The fur gained 5 electrons

b)

The fur lost 5 electrons.

c)

The fur gained 5 protons.

d)

The fur lost 2 electrons.

24.

Two positive charges are being pushed towards each other. Describe its effect on its energy.

a)

There is no effect on their energy.

b)

There is a gain in kinetic energy because they are moving with tendency to attract.

c)

There is a gain in potential energy because their original tendency is to repel from each other.

d)

There is a gain in potential energy because their saving their energy to do work later.

25.

The electric force is most similar to what other FUNDAMENTAL FORCE in the universe?

a)

weak nuclear force

b)

gravitational force

c)

momentum

d)

power

26.

Calculate the electrostatic force between a +7 Coulomb charge and a -4 Coulomb charge separated by a distance of 40 cm (convert to meters).

Use F = k (Charge 1)*(Charge 2)/(distance)^2 or

$F=\frac{kQ_1Q_2}{d^2}$ where k = $k=9\ \cdot\ 10^9$ . Show your steps leading to your answer in scientific notation (adjust the exponent as necessary)

a)

$-2.52\ \cdot10^9\ N$

b)

$-1.75\ \cdot\ 10^{11}\ N$

c)

$-6.3\ \cdot10^{11\ }N$

d)

$-1.575\ \cdot10^{12}\ N$

27.

Convert 7800 to scientific notation

a)

$7.8\ \cdot10^2$

b)

$7.8\cdot10^4$

c)

$7.8\ \cdot10^3$

d)

$78\cdot10^2$

28.

The charge of an electron is

a)

neutral

b)

positive

c)

negative

d)

can be either positive or negative

29.

What method of charging adds electrons to a balloon when you rub it with a piece of rabbit's fur?

a)

conduction

b)

induction

c)

friction

d)

resonance

30.

The slope of the graph that shows the relationship between the amount of work done in running up stairs and the time it took would have units of:

a)

joules

b)

Newtons

c)

watts

d)

seconds

31.

The line normal to a surface is:

a)

parallel to it

b)

perpendicular to it

c)

at a 60 degree angle to it

32.

As the sound of a car's horn passes and recedes from you, the frequency of the sound seems to

a)

increase

b)

decrease

c)

stay the same

33.

Which of these is a method of transferring charge?

a)

resonance

b)

reflection

c)

induction

d)

acceleration

34.

What happens when one light bulb in a SERIES circuit burns out?

a)

the others get brighter

b)

all the bulbs go out

c)

the rest of the circuit stays the same

d)

The other bulbs shine with less intensity

35.

The bending of light as it passes from one medium to another is called:

a)

diffraction

b)

reflection

c)

resonance

d)

refraction

36.

Which law shows the relationship between the force between 2 charges and the distance of separation between them?

a)

Ohm's Law

b)

Newton's Law of Gravitation

c)

Coulomb's Law

d)

Faraday's Law

37.

What variable do Coulombs represent?

a)

Electrostatic Charge

b)

Force

c)

Current

d)

Energy

38.

According to Coulomb's Law, what situations will cause the force between 2 objects to increase? Read each statement carefully.

a)

decrease the magnitude of at least one of the charges OR increase the distance between the two charges

b)

increase the magnitude of at least one of the charges OR increase the distance of separation between the charged objects

c)

increase the magnitude of at least one of the charges OR decrease the distance between the 2 charges

d)

decrease the magnitude of at least one of the charges OR decrease the distance between the 2 charges

39.

What is a closed path for electrons to flow through?

a)

circuit

b)

hoop

c)

shape

d)

current

40.

Which will increase the current in a circuit? Select 2 that apply,

a)

decrease the resistance

b)

decrease the voltage

c)

increase the resistance

d)

increase the voltage

41.

One ampere or amp of current is equivalent to________________

a)

one ohm per second

b)

one newton per second

c)

one joule per second

d)

one coulomb per second

42.

1 Volt is equivalent to __________

a)

1 coulomb per joule

b)

1 joule per coulomb

c)

1 newton per joule

d)

1 joule per newton

43.

Which of the following are "series" circuits. Select all that apply.

a)

b)

c)

d)

44.

What is true about current in a series circuit?

a)

The current in a series circuit is the sum of all of the currents through the resistors .

b)

The current is equal through all resistors.

45.

Calculate the total resistance in this series circuit.

a)

$400\ \Omega$

b)

$\frac{450\ \Omega}{ }$

c)

$\frac{1}{450}\Omega$

d)

$350\ \Omega$

46.

What is true about the potential difference or voltage through all the resistors in a SERIES circuit?

a)

they are all equal

b)

the total voltage is the sum of all of the voltages through the resistors

47.

The current flowing through a 4 ohm resistor is 8 amps. What is the potential difference or voltage?

a)

12 V

b)

1/2 V

c)

2 V

d)

32 V

48.

What is resistance?

a)

Electric potential difference

b)

The ability to increase the flow of electrons

c)

The ability to decrease the flow of electrons

d)

decreasing the diameter of the material

49.

Which of the following are correct forms of Ohm's Laws? Select all that apply.

a)

V = I/R

b)

V=I R

c)

I = R/V

d)

I = V/R

e)

R=V/I

50.

Show your work. Calculate the resistance in which there is a 0.4 A of current and a 12 V of potential difference.

a)

$30\ \Omega$

b)

$4.8\ \Omega$

c)

$0.033\ \Omega$

d)

$3\ \Omega$

51.

Select the characteristics that affect resistance.

a)

temperature, length, width, type of material

b)

fluidity, viscosity, resonance

c)

temperature, type of material, fluidity

d)

length, width, height, volume

52.

Show work. Calculate the total resistance of the parallel circuit. Use a common denominator and adjust the numerators prior to adding. Then take the reciprocal of your result to obtain $R_T$ $\frac{1}{R_T}=\frac{1}{R_1}+\frac{1}{R_2}$

a)

$\frac{8}{3}\ \Omega$

b)

$12\ \Omega$

c)

$\frac{3}{8}\ \Omega$

d)

$\frac{1}{6}\Omega$

e)

$\frac{4}{3}\ \Omega$

53.

Show your work.

Calculate the power supplied by a resistance of 10 ohms and a voltage of 4 Volts.

Formulas: Power = I * V and I = V/R, where I is the current, V is the voltage and R is the resistance.

a)

14 W

b)

40 W

c)

1.6 W

d)

0.4 W

54.

Show work. Calculate the total resistance of the parallel circuit. Use a common denominator and adjust the numerators prior to adding. Then take the reciprocal of your result to obtain $R_T$

Use $\frac{1}{R_T}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}$

a)

$\frac{12}{5}\Omega$

b)

$24\ \Omega$

c)

$\frac{1}{24}\Omega$

d)

$\frac{24}{11}\Omega$

e)

$2\ \Omega$

55.

Suppose the battery of this parallel circuit is 16 Volts. What is the voltage at each branch?

a)

Also 16 V

b)

8 V

c)

$\frac{16}{3}\ V$

d)

$\frac{1}{16}V$

56.

Show your work.

Given from the previous question that the voltage is 16 V, calculate the current at each branch: $I_1,\ I_2,\ I_{3_{ }}$

a)

8A, 4A, 12A

b)

$\frac{1}{2}A,\ \frac{1}{4}A,\ \frac{3}{4\ }A$

c)

$2A,\ 4A,\ \frac{4}{3}A$

d)

128A, 64A, 192A

57.

Which formulas are correct for calculating the voltage? Select two that apply.

a)

$V=\frac{W}{q}=\frac{Work}{Ch\arg e}\$

b)

V=Work * charge

c)

$V=\frac{Electricfield}{dis\tan ce}$

d)

V = distance * electric field

58.

Which is the correct formula for calculating the magnitude of the electric field called "E"?

a)

$E=\frac{d}{V}$

b)

E=dV

c)

$E=\frac{V}{d}$

59.

Which relate to the study of Physics (as in this class)? Select all that apply.

a)

electricity, electrostatics, electromagnetics

b)

power as it pertains to politics

c)

transfer of energy, conservation of energy

d)

forces, motion

e)

mitochondria, photosynthesis

60.

Which formula with the gravitational constant of "G", allows us to calculate the gravitational force between 2 objects of a given mass and a distance of separation of "d" ? This is also known as Newton's Law of Gravitation.

a)

$F=\left(Gm_1m_2\right)d^2$

b)

$F=\frac{Gm_1m_2}{d}$

c)

$F=\frac{G\left(m_1\ +\ m_2\right)}{d^2}$

d)

$F=\frac{Gm_1m_2}{d^2}$

Practice for Physics Final Exam - Semester 2 2022

Total questions: 60

Worksheet time: 45mins

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