Motion and Force
The point used to determine if an object is in motion.
What is a reference point?
This describes slowing down in physics terms.
What is negative acceleration?
This includes direction, unlike speed.
What is velocity?
This principle helps you accelerate buoyant force.
What is Archimedes' Principle?
What is the SI unit for energy?
What is the joule?
How motion can look different depending on the observer's point of view.
What is relative motion?
The SI unit for acceleration.
What is meters per second squared?
This type of speed is measured in a single moment.
What is instantaneous speed?
An object will float is this is true about the displaced fluid.
What is the object's weight is less than the weight of the displaced fluid.
One type depends on motion, the other on position.
What is the difference between kinetic energy and potential energy?
The SI unit to measure force.
What is a newton?
This property resists changes in motion.
What is inertia?
These two factors affect the strength of friction.
What are surface type and force pressing the surface together?
What is the SI unit for pressure?
What is the pascal (Pa)?
Gravitational, elastic, chemical
What are three types of potential energy?
All forces acting on an object together.
What is net force?
The law that explains why a baseball thrown with more force has more acceleration.
What is Newton's second law?
Compare sliding and rolling friction and explain why ball bearings are used in machines.
What is sliding friction is greater than rolling friction and ball bearings reduce friction by changing sliding friction to rolling.
You can do this by decreasing the surface area.
What is increase pressure?
The acceleration due to gravity on Earth.
What is 9.8 m/s2?
An object experience two forces: 15N to the right and 7 N to the left. Calculate the net force and describe the direction.
What is 8 N to the right?
A rocket lifts off the ground, pushing exhaust gases downward. Explain which of Newton's Laws applies and how.
What is Newton's 3rd Law- the action of gases being pushed down causes a reaction force pushing the rocket upward.
Two objects are dropped from a high altitude- one heavy and one light. Without air resistance, what happens? Why?
What is they fall at the same rate (9.8 m/s2) because gravity is independent of mass.
Explain how the Bernoulli Principle contributes to airplane lift using the shape of the wing.
What is faster air moves over a curved wing, creating lower pressure, and the higher pressure underneath pushing the wing upward?
A 3 kg ball is dropped from a height of 10 m. Calculate the GPE at the top and its KE just before hitting the ground.
What is 294 J for both. (assuming no loss to friction)