Lesson 1
What is a force?
A push or pull
How do you find speed?
speed= distance/time
What is inertia?
Resistance to change in motion.
What is fluid friction usually referred to as?
Air resistance
what planet in our soler system has the most mass;.
jupiter
Is motion relative?
Yes.
What is the difference between speed and velocity?
Velocity says which direction an object is going.
How does mass relate to inertia?
An object with more mass has greater inertia.
Which type of friction do wheels create?
Rolling friction.
How do you find weight?
W=gm
A place or object used for comparison to determine whether something is in motion?
Reference point.
How do you find speed on a graph?
You find the slope of the line.
An object at rest will remain at rest unless acted upon by a ____________.
nonzero net force
What is the difference between sliding and static friction?
Static friction acts on objects when they are resting on a surface. Sliding friction occurs when two solid surfaces slide across each other.
what is inertia?
recentance to fruce
What unit is used to measure the strength of a force?
Newton.
Acceleration is a change in what two things?
Speed or direction.
What is the formula used to represent Newton's second law of motion?
F=ma
What is the force of gravity on Earth?
9.8 m/s2
how many laws does newton have
3
If an object is being pulled 6N to the right and 2N to the left what is its net force?
4N to the right.
What is the equation used to find acceleration?
Acceleration=(final speed-initial speed)/time
What is Newton's third law of motion?
Every action has an equal and opposite reaction.
What affects potential and kinetic energy?
Potential= position
Kinetic= motion
how many elemnts are in the periodic table
118