WorksheetsPhysics S2 Final Exam Review
Total questions: 55
Worksheet time: 28mins
If two objects are traveling at the same speed, but have different masses, which one will have more momentum?
The object with greater mass
The object with lesser mass
Both have the same momentum
Momentum does not depend on mass
How would the momentum of the same object change, if it began to travel at a faster speed?
The momentum would decrease.
The momentum would stay the same.
The momentum would increase.
The momentum would become zero.
Which of the following actions would cause the momentum of an object to change?
Changing the object's mass
Changing the object's velocity
Applying a force to the object
Keeping the object at rest
A 15 kg ball is thrown at 6 m/s. What is the ball’s momentum?
21 kg·m/s
90 kg·m/s
45 kg·m/s
9 kg·m/s
A cannon fires a cannonball. The forward speed of the cannonball is greater than the speed of recoil (backwards) of the cannon because:
the cannonball has less mass than the cannon
the cannonball has more mass than the cannon
the forces on both are different
the cannonball is fired at an angle
The momentum of a baseball is 45 kg·m/s. If the ball has a speed of 17 m/s, what is its mass?
2.65 kg
3.5 kg
0.38 kg
0.75 kg
A 8 kg bird flying in a straight line has a momentum of 17 kg·m/s. What is its velocity?
2.1 m/s
1.5 m/s
3.2 m/s
4.5 m/s
If you jump off of the bleachers, why is it a good idea to bend your knees as you land? If landing with your knees locked shortens the impact time to 1/5 of the time compared to having your knee bent, how would landing with your knees locked affect the force on your body?
It increases the force on your body.
It decreases the force on your body.
It has no effect on the force on your body.
It makes you bounce higher.
A kickboxer kicks the arm of his opponent. The force on the kickboxer's foot/leg compared to the force on his opponent’s arm is:
Greater
Less
Equal
Cannot be determined
Bike helmets have a lining made of foam material because:
The foam reduces the force by increasing the time over which the momentum changes during an impact.
The foam makes the helmet heavier for better protection.
The foam is only for comfort and has no effect on force or momentum.
The foam increases the force during an impact.
Which requires the greater impulse: A raindrop hitting the ground and stopping in a puddle, or having a raindrop hit the ground and “bounce” back up with a splash?
A raindrop stopping in a puddle
A raindrop bouncing back up with a splash
Both require the same impulse
It depends on the size of the raindrop
Block A and Block B have identical masses. If Block A is traveling at 11 m/s and it collides with Block B which is at rest. If Block A is then observed to be at rest, what must be true about the velocity of Block B?
Block B is at rest.
Block B is moving at 11 m/s.
Block B is moving at 5.5 m/s.
Block B is moving at -11 m/s.
An airplane and a bird have a head-on collision in mid-air. Which will undergo the greater change in momentum during the time of the collision?
The airplane
The bird
Both undergo the same change in momentum
Neither undergoes a change in momentum
A fly with a momentum of 1.3 kg·m/s lands on a stick that is initially at rest, causing the stick to roll forward. If the fly stays on the stick, what is the combined momentum of the fly and stick as they begin to roll?
1.3 kg·m/s
0.0 kg·m/s
2.6 kg·m/s
0.65 kg·m/s
What changes as a result of doing a job more quickly; work or power?
Power
Work
Energy
Force
What will happen if you apply the same force, but do it over a longer distance?
The work done increases
The work done decreases
The force decreases
The distance decreases
How much work is done if 45 N of force is applied to push a crate over a 6 meter distance?
270 J (Work = Force × Distance = 45 N × 6 m)
90 J (Work = Force × Distance = 15 N × 6 m)
180 J (Work = Force × Distance = 30 N × 6 m)
360 J (Work = Force × Distance = 60 N × 6 m)
How much power is needed to do 100 J of work in 10 seconds?
10 W (Power = Work / Time = 100 J / 10 s)
1 W
1000 W
0.1 W
How much power is needed to lift a 52 kg crate a distance of 2 meters in 5 seconds?
203.84 W (Work = 52 kg × 9.8 m/s² × 2 m = 1019.2 J; Power = 1019.2 J / 5 s = 203.84 W)
104 W
510 W
52 W
The potential energy of an object is determined by:
its mass and position
its color
its temperature
its speed
The kinetic energy of an object is determined by:
its mass and velocity
its color and shape
its temperature and pressure
its volume and density
The ball is at rest at the top of a hill. At which location will the ball have maximum potential energy?
At the top of the hill
At the bottom of the hill
Halfway down the hill
On the ground next to the hill
The ball is at rest at the top of a hill. The ball will have maximum kinetic energy at which point?
At the top of the hill
At the middle of the hill
At the bottom of the hill
At any point on the hill
27. The potential energy of a 40 kg child standing at the top of a 7.0 meter high staircase is:
1960 J
280 J
400 J
2744 J
28. What is the velocity of a 2850 kg car whose kinetic energy is 557,500 J?
7 m/s
14 m/s
22 m/s
28 m/s
What is the total mechanical energy of a 35.0 kg child who is sitting at the top of a slide that is 6.5 meters in height?
2275 J
1200 J
350 J
650 J
According to Newton, the greater the masses of interacting objects, the ____________ the gravitational force between them.
greater
lesser
same
weaker
According to Newton, quadrupling the distance between two interacting objects changes the gravitational force between them by ____________.
1/16 (the force becomes one-sixteenth as great)
1/4 (the force becomes one-fourth as great)
1/8 (the force becomes one-eighth as great)
1/2 (the force becomes half as great)
Suppose the gravitational force between two masses is 74.2 Newtons. If the mass of object 1 was doubled, the mass of object 2 was tripled, and the distance between them stayed the same, what would be the new force between the new objects?
74.2 N
148.4 N
222.6 N
445.2 N
What is the gravitational attraction between a bear and a tree, if the distance between them is 25.0 meters?
9.8 N
0.0000001 N
0.0000000001 N
1 N
What is the gravitational attraction between the Earth and the Moon? The distance between them is 3.44 x 10^8 meters.
1.98 x 10^20 N
7.34 x 10^22 N
3.44 x 10^8 N
6.67 x 10^11 N
The study of “electrostatics” includes:
the study of stationary electric charges
the study of moving electric charges
the study of magnetic fields
the study of sound waves
36. Electrical forces can ____________________ OR ______________________, while gravitational forces can only ________________________.
Electrical forces can attract OR repel, while gravitational forces can only attract.
Electrical forces can attract OR attract, while gravitational forces can only repel.
Electrical forces can repel OR repel, while gravitational forces can only attract.
Electrical forces can attract OR repel, while gravitational forces can only repel.
The relationship between the number of protons and electrons in an electrically neutral atom is that:
The number of protons is greater than the number of electrons.
The number of protons is less than the number of electrons.
The number of protons is equal to the number of electrons.
There is no relationship between the number of protons and electrons.
A particle with 6 protons and 7 electrons would be attracted to or repelled by a particle with 7 protons and 6 electrons because:
They have opposite net charges and attract each other.
They have the same net charge and repel each other.
Both are neutral and do not interact.
They have the same number of protons and electrons.
39. The “conservation of charge” means that:
charge can be created or destroyed
the total charge in an isolated system remains constant
charge can only be positive
charge always flows from high to low potential
If you wipe off your lab desk and the paper towel becomes negatively charged, what has happened to the charge on the surface of the lab desk?
The lab desk has gained electrons.
The lab desk has lost electrons.
The lab desk has become negatively charged.
The lab desk has remained neutral.
41. What will happen to the electric force between two particles if you double the distance between them?
It will double
It will become one-fourth
It will remain the same
It will be halved
If the electrical FORCE between two charges is NEGATIVE, the particles are:
attracted to each other
repelled by each other
43. If two particles each have a charge of 3.1×10−12C and are at a distance 4.7×10−3meters apart, what electric force will they exert on each other?
4.0 x 10^{-6} N
3.9 x 10^{-7} N
3.9 x 10^{-9} N
1.8 x 10^{-8} N
Metals are good conductors because, according to atomic structure, they have:
Tightly bound electrons that do not move freely
Free electrons that can move easily through the lattice
No electrons in their outer shell
Electrons that are shared only in pairs
Charge by induction differs from charge by friction or contact in that:
Induction does not require direct contact between objects, while friction and contact do.
Induction involves rubbing two objects together, while friction does not.
Induction always results in both objects having the same charge, while friction does not.
Induction only occurs with metals, while friction occurs with all materials.
The electric current in a solid conductor consists of:
protons
neutrons
electrons
ions
47. The units used to measure electric current are:
Volts
Ohms
Amperes
Watts
In order for a charge to flow through a circuit, the circuit should be:
open
closed
49. The term that describes the electric “pressure” that causes charge to flow is:
Current
Resistance
Voltage
Power
It would be improper to say a “flow of voltage” or “flow of resistance” because:
Voltage and resistance do not flow; only current flows.
Voltage flows but resistance does not.
Resistance flows but voltage does not.
All three can flow.
What is the current through a 30 ohm resistor connected to a 150 V power supply?
2 A
3 A
4 A
5 A
When a 9-V battery is connected to a resistor, the current is 0.6 A. What is the value (in ohms) of the resistor?
6 Ω
15 Ω
0.067 Ω
5.4 Ω
The total equivalent resistance in a parallel circuit is found by:
Adding all resistances together
Multiplying all resistances together
Taking the reciprocal of the sum of reciprocals of all resistances
Subtracting the smallest resistance from the largest
The total resistance in a series circuit is found by:
Adding all the individual resistances together
Multiplying all the individual resistances together
Taking the average of all the resistances
Subtracting the smallest resistance from the largest
If the period of a wave is 15 seconds, what is its frequency?
0.067 Hz
0.15 Hz
6.7 Hz
0.015 Hz
What is the speed of a wave that has a frequency of 0.8 Hz and a wavelength of 7 meters?
5.6 m/s
0.11 m/s
8.75 m/s
56 m/s
A wave has a speed of 3.5 m/s, and a frequency of 3.2 x 10^14 Hz. What is its wavelength in meters?
1.09 x 10^{-14} meters
1.12 x 10^{-12} meters
9.84 x 10^{-16} meters
2.80 x 10^{-13} meters
An electromagnetic energy wave has a wavelength of 5.3x103 meters. The speed of light is 3.0x108 m/s. What is the frequency of this light?
5.66 x 10^4 Hz
1.77 x 10^5 Hz
6.25x102 Hz
3.21 x 10^6 Hz
