Work and Power
What is the formula for work?
W = Force × Distance
What is a simple machine that consists of a wheel with a rope or cable wrapped around it?
Pulley
What is the formula for gravitational potential energy?
PE = m × g × h
What method is used to separate sand from water?
Filtration
When should you submit any remaining work on Google classroom?
End of the day today
What unit is used to measure power?
Watts (W)
Which simple machine is a sloping surface that helps lift heavy objects?
Inclined Plane
Define kinetic energy
Kinetic energy is the energy of motion
Which technique is used to separate a liquid from a solution based on differences in boiling points?
Simple Distillation
What is everyone's faaaavorite subject?
Math
How does doubling the force affect the work done?
It doubles the work.
In a second-class lever, where is the load located in relation to the effort and the fulcrum?
The load is located between the effort and the fulcrum.
What happens to potential energy when a pendulum swings from its highest point to its lowest point?
Potential energy is converted into kinetic energy.
What separation method is commonly used to extract pigments from plant materials?
Chromatography
What does the law of conservation of energy
Energy cannot be created or destroyed, only transformed from one form to another
A person applies a force of 50 N to push a box 5 meters. How much work is done?
250 Joules
Name the type of machine that combines multiple simple machines to reduce effort, such as a wheelbarrow.
Compound Machine
What happens to energy in the context of a roller coaster and the conservation of energy?
The total energy of the roller coaster remains constant, with energy shifting between kinetic energy (motion) and potential energy (height)
What technique is useful in separating oil from water?
solvent extraction
What is Teacher Simmona's favorite color?
Red
A worker uses a pulley system to lift a heavy load. The worker notices that using the pulley requires less effort but takes more time than lifting the load directly. How is work affected?
The total work done remains the same because work depends on the weight of the load and the height it is lifted.
How are wedges and inclined planes different?
Both are sloping surfaces, but a wedge is used to split or cut objects by applying force, while an inclined plane is used to move objects to a higher or lower position with less effort
Explain why a pendulum eventually stops swinging
Friction and air resistance
What is the difference between evaporation and crystallization?
Evaporation removes a liquid from a solution to leave a solid behind vs. Crystallization purifies solids
What type of energy transformation occurs when a car engine burns fuel to move the car?
Chemical energy is transformed into kinetic energy.