Forces
This type of quantity has only magnitude and no direction.
What is a scalar quantity?
A delivery drone travels 500 m east to drop off a package. A student describes the drone’s motion using different measurements.
Which measurement includes both how far the drone traveled and the direction it moved?
What is Displacement
The SI unit used to measure work.
What is the joule (J)?
Name the 6 different types of simple machines?
What are the lever, pulley, wheel and axle, inclined plane, screw, and wedge
The two main forms of mechanical energy.
What are kinetic energy and potential energy?
This type of quantity has both magnitude and direction.
What is a vector quantity?
During a tug-of-war, two teams pull on a rope with equal strength but in opposite directions.
Which physical quantity must include direction to fully describe what is happening?
What is Force
Chiang Mai is about 700 km away from Bangkok. If a plane takes 1.5 hours
to fly from Bangkok to Chiang Mai, what i s the average speed at which the
plane travels
129.62 m/s
This part of a lever is the point around which it rotates.
What is the fulcrum?
The energy an object has because of its motion.
What is kinetic energy?
Force is an example of this type of quantity.
What is a vector?
A student pushes a shopping cart in a supermarket and wants to record how strong the push is.
Which unit should the student use to measure this push?
Newton (N)
Bob rode a motorcycle from his house to a beach at a speed of 70 km/h.
After one hour, he stopped to fill up his gas tank. What is the distance from his house to the gas station?
70 km
A knife blade is an example of this simple machine.
What is a wedge
Lifting an object higher does this to its gravitational potential energy.
What is increases it?
The SI unit used to measure force.
What is the newton (N)?
A sealed plastic bottle is pushed underwater and then released.
What will happen to the bottle and why?
It floats upward because buoyant force acts upward
This quantity describes how fast work is done.
What is power?
This simple machine changes the direction of a force when lifting a load.
What is a pulley
A stretched rubber band is an example of this type of potential energy.
What is elastic potential energy?
Pressure is calculated by dividing force by this quantity.
What is area?
A student sprinkles iron filings around a bar magnet and notices the filings cluster most densely near the ends.
What does this observation show?
Magnetic field strength is greatest at the poles
Two students lift the same box to the same height. The student who lifts it faster has more of this.
What is power?
This simple machine is an inclined plane wrapped around a cylinder.
What is a screw?
A student rides a bicycle down a hill and then continues on a flat road. As the bicycle moves downhill, it speeds up. On the flat road, the bicycle gradually slows down and eventually stops.
Which statement best explains what happens to the energy during this entire process?
Energy is changed from one form to another, but the total amount of energy remains the same.