Forces
What are the units of force?
Newtons (N)
What type of energy does a dam have?
Mechanical (Potential)
Why does oil float on water?
Oil has a lower density than water.
Convert 0.0056 kilograms to milligrams.
5,600 mg
You are boiling water. The cold water starts to sink and the warm water rises. What is this an example of?
Convection
A force is a push or pull. Name two effects a force can have on an object.
It can change the object's state of motion or deform it
What does kinetic energy depend on?
Mass and Speed
What property describes a liquid’s ability to take the shape of a container?
Fluidity
Convert 5 hours to seconds.
(Show your work!)
18,000 seconds
Name 3 objects with 2 or more energy forms.
Various answers
What is Hooke's Law? What is the equation?
The displacement or deformation of an elastic object is proportional to the force applied.
F = k ∆x
A 5 kg object is lifted to a height of 3 m. How much gravitational potential energy does it have?
147 Joules
Give an example of an extensive property.
Mass or volume.
Convert 80 kilometers to hectometers.
800 hm.
What are some examples of granular material?
Sand, Salt, Sugar
Two people push a box with 50 N to the right and 30 N to the left. What is the net force and direction?
20 N to the right.
What are the 6 main energy types?
Light, Sound, Chemical, Thermal, Electrical and Mechanical
Name a property that does not depend on the amount of material.
Density or temperature
Convert 120 m/s to km/h.
432 km/h
Name 3 real world applications of magnetic forces.
Credit cards, compass, MRI machine, speaker, Maglev trains, door locks, fridge magnets
If two concurrent forces acting on an object have different lines of action, we use the _____ ___ to determine the resultant force.
Pythagoras' theorem
Name 3 renewable energy sources and 3 non-renewable sources.
Renewable: solar, wind, hydropower, geothermal, tidal, biomass
Non-renewable: coal, oil, natural gas, nuclear
Why is compressibility higher in gases than in solids?
Gas particles are farther apart, allowing them to be squeezed closer together.
Convert 14,500 kg/m³ to g/cm³
14.5 g/cm³
The _____ the particles of an object vibrate, the ______ the object will be.
Heat always flows in the same direction: from _____ to _____.
faster; warmer
hot; cold