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Pertanyaan 1
Pilihan ganda
If you have 1 moles of a substance, how many molecules do you have?
- 1.2 x 10^23
- 6.02 x 10^23
- 1.2 x 10^24
- 6.02 x 10^24
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Review Grade 8
Yanni Maharani
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Pertanyaan 2
Pilihan ganda
Which safety feature in cars is designed to increase the time over which momentum changes, reducing force?
- Seatbelts
- Airbags
- Anti-lock brakes
- GPS
Pertanyaan 3
Pilihan ganda
What is the relationship between momentum, mass, and velocity?
- Momentum = Mass + Velocity
- Momentum = Mass - Velocity
- Momentum = Mass x Velocity
- Momentum = Mass / Velocity
Pertanyaan 4
Pilihan ganda
How do you calculate work done when a force moves an object?
- Work = Force + Distance
- Work = Force x Distance
- Work = Force - Distance
- Work = Force / Distance
Pertanyaan 5
Pilihan ganda
Which statement correctly describes the conservation of energy?
- Energy can be created and destroyed.
- Total energy is constant and can only change forms.
- Kinetic energy is always greater than potential energy.
- Energy is only conserved in closed systems.
Pertanyaan 6
Pilihan ganda
What kind of energy is stored in an object that is lifted to a certain height?
- Kinetic energy
- Thermal energy
- Gravitational potential energy
- Chemical energy
Pertanyaan 7
Pilihan ganda
If a ball is dropped from a height, what happens to its gravitational potential energy as it falls?
- It increases.
- It decreases.
- It remains the same.
- It turns into chemical energy.
Pertanyaan 8
Pilihan ganda
What is kinetic energy?
- Energy stored in batteries
- Energy of motion
- Energy from the sun
- Energy stored in food
Pertanyaan 9
Pilihan ganda
How is power related to work done?
- Power = Work x Time
- Power = Work / Time
- Power = Work + Time
- Power = Work - Time
Pertanyaan 10
Pilihan ganda
Which factor does NOT affect the momentum of an object?
- Mass
- Velocity
- Acceleration
- Direction
Pertanyaan 11
Pilihan ganda
What is the relationship between work done and energy?
- Work done is the energy transferred to an object
- Work done is unrelated to energy
- Energy reduces when work is done
- Work done increases the mass of an object
Pertanyaan 12
Pilihan ganda
Which of the following is a form of potential energy?
- Kinetic energy
- Gravitational energy
- Thermal energy
- Sound energy
Pertanyaan 13
Pilihan ganda
How is kinetic energy related to motion?
- It is energy stored in bonds
- It is energy due to motion
- It is energy from the sun
- It is energy from batteries
Pertanyaan 14
Pilihan ganda
What is the unit of power in the metric system?
- Joule
- Watt
- Newton
- Meter
Pertanyaan 15
Pilihan ganda
How is work done related to force and distance?
- Work done is force times distance
- Work done is force plus distance
- Work done is force divided by distance
- Work done is force minus distance
Pertanyaan 16
Pilihan ganda
What happens to potential energy when an object is raised to a higher level?
- It decreases
- It stays the same
- It increases
- It converts to thermal energy
Pertanyaan 17
Pilihan ganda
Which of these describes power in physics terms?
- The energy stored in an object
- The rate of doing work
- The speed of an object
- The mass of an object
Pertanyaan 18
Pilihan ganda
How does force relate to change in momentum?
- Force is the change in momentum over time
- Force is unrelated to momentum
- Force is momentum times time
- Force is momentum divided by mass
Pertanyaan 19
Pilihan ganda
What does gravitational energy depend on?
- The speed of an object
- The mass and height of an object
- The color of an object
- The temperature of an object
Pertanyaan 20
Pilihan ganda
When is work considered to be done on an object?
- When the object is moved by a force
- When the object is heated
- When the object remains stationary
- When the object is cooled
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