Newton's First Law
These types of forces result in no change in an object's motion or speed.
What are balanced forces?
This formula mathematically defines Newton's Second Law.
What is F = ma?
This law states that for every action, there is an equal and opposite reaction.
What is Newton's Third Law?
This is the standard unit used to measure force.
What is the Newton (N)?
On a free-body diagram, this feature of an arrow represents the strength or magnitude of the force.
What is the size (or length) of the arrow?
According to this law, an object at rest will stay at rest unless acted upon by an outside force.
What is Newton's First Law?
If you double this property of a moving object, you also double its kinetic energy.
What is mass?
This causes energy to be transferred into or out of objects when they come into contact.
What is a collision?
This is the mathematical formula used to calculate the speed of a walking person using a graph.
What is speed = distance/time?
This force opposes motion and changes depending on whether a box is pushed across carpet, ice, or gravel.
What is friction?
These types of forces cause an object's speed or direction to change.
What are unbalanced forces?
If an object's mass or speed increases, these two things will also increase.
What are kinetic energy and force?
This phenomenon occurs to all objects, including a drum and drumstick, during a collision, though it may be too small to see with the naked eye.
What is bending or changing shape (deformation)?
This is an object's speed if it goes 100 meters in 5 seconds.
What is 20 m/sec2?
Of carpet, ice, and gravel, this surface requires the most energy to push a box across at the same speed.
What is gravel (due to having the highest friction)?
Objects with different speeds and masses require different amounts of this to change their motion.
What is force?
Between mass and speed, this factor affects the total amount of Kinetic Energy a lot more.
What is speed?
This explains why two carts bounce backward away from each other when they crash.
What is because each cart exerts an equal and opposite force on the other?
If a graph shows a person walking at a constant speed covering 5 km in 5 hours, this is their speed.
What is 1 km/h?
In a sealed container, increasing the density of these tiny objects increases the friction acting on a dropped marble.
What are gas particles?
This property of matter makes a more-massive object require more energy to speed up or slow down compared to a lower-mass object.
What is inertia?
A box is pushed with 50 Newtons of force and accelerations at 5 m/sec2 . This must be the object's mass.
What is 10 grams (or kilograms)?
This is what an object reaches when it no longer goes back to its original shape.
What is its elastic limit?
This is why the unit for acceleration is meters/seconds2
Acceleration is change in speed over time and the units for that are meters/second/second
When a person pushes a box at a perfectly constant speed, the arrow for the pushing force and the arrow for friction must look like this on a diagram.
What is equal in size but opposite in direction (balanced)?