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WorksheetsQ2 Physics Final SG 10A
Total questions: 69
Worksheet time: 46mins
What is the approximate momentum of a car with a mass of 2500 kg and a velocity of 30.0 m/s?
75 N.s
750 N.s
7,500 N.s
75,000 N.s
The diagram shows the inelastic collision between the moving sphere, sphere 1, and the static sphere, sphere 2.
What is the direction of sphere 2 after the collision?
to the left
to the right
to the up
not moving
A 1000 kg car accelerates from rest to 6.0 m/s. What is the magnitude of the car's final momentum?
0.8 kg×m/s
800 kg×m/s
4000 kg×m/s
6000 kg×m/s
The table above lists the masses and velocities of several moving things.
Which of the things listed has a momentum nearest that of the baseball's momentum of 6.5 kgm/s?
Dog
Truck
Steel Pellet
Toy Car
Coal-powered plants are designed specifically to convert
electrical energy to heat energy.
chemical energy to electrical energy.
electrical energy to radiant energy.
kinetic energy to potential energy.
Which energy transformation takes place in a gasoline lawn mower?
potential energy to electrical energy
electrical energy to potential energy
kinetic energy to chemical energy
chemical energy to mechanical energy
Which statement is true concerning energy?
Light bulbs convert some electrical energy to thermal energy.
Kinetic energy disappears as a box slides across a rough floor.
Gravitational (potential) energy is lost as a car rolls down a hill.
Energy that moves through a wire is destroyed when a circuit is closed.
Which of these processes is a conversion made by solar panels?
mechanical energy to nuclear energy
thermal energy to chemical energy
kinetic energy to potential energy
radiant energy to electrical energy
The picture shows a circuit with a light bulb.
When the current powers the light bulb, the light produced is the result of electrical energy being
increased.
stopped.
absorbed.
transformed.
The drawing represents solar cells.
Which statement BEST describes how energy is converted in solar cells?
Thermal energy is converted into radiant energy.
Radiant energy is converted into electrical energy.
Nuclear energy is converted into chemical energy.
Mechanical energy is converted into thermal energy.
In a gasoline-powered car, chemical energy from gasoline is transformed to make the car move. The motion of the car is what form of energy?
radiant energy
nuclear energy
electrical energy
mechanical energy
Which of the following BEST shows the basic three-step energy transformation for a battery-operated radio?
Acoustical → Mechanical → Electrical
Mechanical → Acoustical → Chemical
Chemical → Electrical → Acoustical
Electrical → Acoustical → Chemical
Which BEST describes the transformation of energy in a flashlight?
chemical energy into sound energy
chemical energy into radiant energy
electrical energy into nuclear energy
electrical energy into mechanical energy
Hilda is comparing two light bulbs.
After she observes both of the lit bulbs, she concludes that the fluorescent bulb produces less of which type of energy?
nuclear
thermal
chemical
electrical
Peter does 3,000 joules (J) of work by moving an object 100 meters (m). What is the force that Peter applies to the object?
30 N
300 N
3,000 N
3 N
A robotic arm lifts a stack of cafeteria trays weighing 62 newtons (N). It moves the trays 2 meters (m). How much work has the robotic arm performed?
31 joules
64 joules
124 joules
186 joules
Windmills are shown in the illustration below.
Which energy conversion is taking place as the blades of the windmills rotate?
mechanical to electrical
potential to mechanical
mechanical to chemical
chemical to potential
Susan and Joe push a table 18 meters down a hall by exerting a force of 200 newtons (N). What is the total amount of work done on the table?
1600 joules
1800 joules
2000 joules
3600 joules
A force of 12 N is used to lift a box 0.5 meters above a floor. What amount of work was done to lift the box?
6.0 N•m
6.0 N
24.0 N
24.0 N•m
Jake’s toy truck has a mass of 3 kilograms (kg). Jake pushes the truck with a force of 10 newtons (N). How much work has Jake done on the truck when he pushes it for 2 meters?
5 joules
20 joules
30 joules
60 joules
A group of friends decided to go camping for the weekend. They gathered some tree branches and built a campfire. What type of energy of the tree branches did the friends use?
heat energy
kinetic energy
chemical energy
mechanical energy
A weightlifter lifts a 10 newton (N) weight to a height of 3 meters (m). How much work was done to move the weight?
0.3 N-m
3.0 N-m
3.3 N-m
30.0 N-m
Alice lifted 5 bricks a height of 4 meters (m) each. Each brick weighed 110 newtons (N). What was the total amount of work for Alice to move the bricks?
20 joules
440 joules
550 joules
2200 joules
A force of 120 newtons (N) was applied to a pulley to lift an object a height of 1 meter (m). If 100 joules (J) of work was done on the weight, how much work was used to overcome the force of friction in the pulley?
1.2 joules
20 joules
120 joules
220 joules
A student plans to build a model roller coaster for a science fair. The only energy for the car is the potential energy it contains. The student wants the car to roll from Point 1 to Point 2. Which design allows the car to roll to Point 2 by converting its potential energy into kinetic energy?
A student investigates how far a marble can travel up the incline after rolling down the ramp.
Without friction, what is the maximum height the marble will be able to reach on the incline?
4 cm
7 cm
9 cm
10 cm
Joshua lifted a 100-newton (N) box by doing 1200 joules (J) of work. How high did he lift the box?
1.2 meters
12 meters
20 meters
12,000 meters
A gasoline-powered generator is used to provide lighting for a house.
Which sequence BEST describes the conversion of energy?
mechanical, thermal, electrical, light
electrical, chemical, mechanical, light
chemical, mechanical, electrical, light
thermal mechanical, chemical, light
When the fuel in a gasoline engine is burned, the energy conversion is from
chemical to thermal.
potential to nuclear.
thermal to potential.
electrical to kinetic.
An engineering class has been instructed to develop a robot. The robot must be designed using electromagnetic energy as its only source of power. What topic is the engineering class MOST likely studying?
the use of batteries and chemical energy
how radiant energy and solar collectors can be used
the conversion of kinetic energy to potential energy
how thermal energy can be converted into electrical energy
Dion and Felipe were helping their coach prepare a baseball field for a game. They had to drag a steel-meshed mat around the field.
Which BEST describes the energy transfers that took place in the muscles of the students when they pulled the mat?
thermal to kinetic
kinetic to potential
thermal to mechanical
chemical to mechanical
An automobile engine transforms chemical energy of fuel primarily into
electrical energy and light energy.
electrical energy and mechanical energy.
thermal energy and light energy.
thermal energy and mechanical energy.
What does the mechanical energy of a system include?
the sum of the potential and kinetic energy
the difference of the potential and kinetic energy
only the kinetic energy
only the potential energy
What form of energy is stored in a battery?
chemical
sound
light
heat
Which energy transformation takes place when using a power drill?
heat to mechanical
chemical to electrical
mechanical to chemical
electrical to mechanical
Use the diagram of the circuit to answer the question that follows.
Which condition will cause a magnetic field to be detected near the circuit?
The wire is made of iron.
A current flows through the wire.
The wire is cooled before use.
A switch is added near the bulb.
Which of the following is the BEST example of potential energy?
a fallen rock
a burning match
a liter of gasoline
a red-hot piece of iron
A student sets up a circuit.
After 45 minutes, the light bulb starts becoming dimmer. After 60 minutes, the light bulb is no longer producing light. Which statement provides the BEST conclusion?
The battery lost a small amount of its mass.
All the electrons in the circuit were turned into light energy.
The light bulb destroyed all the available energy stored in the battery.
All available energy stored in the battery was transformed into heat and light.
Raindrops move soil particles from one location to another.
Which energy conversion gives raindrops the capacity to move soil particles?
potential to kinetic
electrical to potential
chemical to mechanical
gravitational to electrical
Which type of energy do muscle cells use to produce mechanical energy in the movement of an arm?
nuclear
radiant
thermal
chemical
Fuel cells have been proposed as a possible source of energy for vehicles. A fuel cell uses the reaction between hydrogen and oxygen to produce an electric current. What type of energy is converted into electricity in a fuel cell?
nuclear energy
thermal energy
chemical energy
mechanical energy
A turbine system is used to produce electrical energy.
Which component of the turbine system contains the greatest amount of energy?
coal
fire
turbine
wires
When a rock is dropped from a height of one meter, the gravitational potential energy of the rock is converted to kinetic energy. When the rock hits the floor and does not bounce, what happens to the kinetic energy of the rock?
The energy is converted to heat and sound.
The energy is destroyed and cannot change form.
The energy is converted to chemical energy.
The energy is returned to gravitational energy.
After eating breakfast, Nikki threw a ball in the air. What sequence describes the energy changes that occur from the time she ate breakfast to the time she threw the ball?
electric to chemical to kinetic
chemical to kinetic to potential
kinetic to potential to chemical
potential to electric to chemical
A book is raised above a table and has a potential energy of 800 joules (J). The potential energy in the book is converted to almost 800 J of kinetic energy as it is dropped. What happens to MOST of the energy from the book when it hits the table?
Most of the energy reverts back to potential energy.
Most of the energy is destroyed when the book stops.
Most of the energy is converted to sound and heat energy.
Most of the energy is converted to electromagnetic energy.
An engineer is studying the transformation of energy by many different types of machines. Although different machines can produce different types of energy, one form of energy is produced by all machines. Which form of energy is produced by all machines?
heat energy
kinetic energy
chemical energy
electrical energy
Doctors listen to the sound of heart vibrations using a stethoscope. The vibrations are caused by the acceleration and deceleration of the blood through the heart. Which type of energy is converted to the sound energy heard in the stethoscope?
potential energy from the height of the person
chemical energy from muscles during exercise
kinetic energy from contractions of the heart muscle
heat energy from the movement of blood through vessels
An electric motor turns the blades of a fan. The input energy of the motor and fan is electrical energy. The output energy is the mechanical energy of the turning blades. The energy output is less than the energy input.
Electrical Energy > Mechanical Energy
Which BEST explains what happened to the rest of the energy?
It was destroyed.
Most of it was lost as heat.
It was converted into a charge.
Most of it was stored as mass in the motor.
Which of the following devices converts chemical energy into electrical energy?
battery
generator
photocell
motor
A bicyclist at the top of a hill begins to coast without pedaling. The bicycle speeds up as it descends to the bottom of the hill and then slows down as it continues up a second hill, where it stops. Which of these sequences BEST describes the energy change of the bicycle from the top of the hill until it stops?
potential — kinetic — kinetic
kinetic — potential — potential
kinetic — potential — kinetic
potential — kinetic — potential
Which of the following is a common application of radioactivity?
cooking with a microwave oven
keeping food warm with infrared lights
using an industrial laser to cut through steel
producing electricity at a nuclear power plant
A school bus uses petroleum as chemical potential energy. This energy is transferred through the engine, which in turn moves the bus. The movement of the bus is an example of what type of energy?
kinetic
potential
thermal
radiation
A 10-kg rock falls from a height of 8.0 m above the ground. What is the kinetic energy of the rock just before it hits the ground?
80 J
98 J
320 J
800 J
The sound made by crickets occurs when the male crickets rubs its two hind legs together. Which type of energy transformation results in the sound made by crickets?
sound energy to thermal energy
thermal energy to chemical energy
mechanical energy to sound energy
mechanical energy to chemical energy
A 2.00 kg stone block gains 100.0 J of gravitational potential energy when it is moved up a ramp. What is the height of the ramp? Use g = 10.0 m/s2.
2.0 m
3.0 m
4.0 m
5.0 m
How much potential energy does a 4 kg object have that is 5 meters off the ground?
20 J
100 J
200 J
400 J
How much kinetic energy doe a 10 kg object traveling 3 m/s?
15 J
30 J
45 J
90 J
A 8 kg cat is running 4 m/s. How much kinetic energy does it have?
64 J
32 J
16 J
8 J
A rock is at the top of a 20 meter tall hill. The rock has a mass of 10 kg. How much potential energy does it have? (use g=10 m/s2)
20 J
200 J
2,000 J
20,000 J
A rolling ball has 18 joules of kinetic energy and is rolling 3 m/s. Find its mass.
2 kg
3 kg
4 kg
6 kg
How high up is a 3 kg object that has 300 joules of energy? (use g= 10 m/s2)
100 m
10 m
30 m
3 m
Which of the following has the MOST momentum?
rolling ping-pong ball
rolling bowling ball
rolling soccer ball
rolling basketball
Which of the following has the MOST momentum?
Baseball in the pitchers hand
Baseball, lost, in a messy room
Baseball in flight
Baseball in a catchers mitt
An object has a mass of 5 kg, a displacement of 25 m, and a time of 5 s, what is its momentum?
5 kgm/s
25 kgm/s
35 kgm/s
45 kgm/s
Jorge noticed a collision outside the coffee shop where two cars collided and stuck together. What type of collision did he observe?
Elastic collision
Inelastic collision
Completely inelastic collision
none
A large truck and a Volkswagen have a head-on collision. Which vehicle experiences the greatest force of impact?
Volkswagen
Large truck
The same
None
A baseball player holds a bat loosely and bunts a ball. Express your understanding of momentum conservation by filling in the tables above and chose the correct answer.
a= 30 kg m/s; b= 40 kg m/s; c= 40 kg m/s
a= 30 kg m/s; b= 40 kg m/s; c= 30 kg m/s
a= 40 kg m/s; b= 40 kg m/s; c= 30 kg m/s
a= 40 kg m/s; b= 30 kg m/s; c= 40 kg m/s
If the forces acting upon an object are balanced, then the object
must not be moving.
must be moving with a constant velocity.
must not be accelerating.
none of these
Which statement below correctly describes the relationship between work and energy?
Energy is the ability to do work.
Work must be done in order for energy to be transferred between objects.
Work must be done in order for energy to change from one form to another.
All of the above.
