Motion, Speed and Velocity
The distance an object travels per unit of time.
speed
This is the rate at which velocity changes.
acceleration
This is a push or a pull on an object.
force
This is the force that two surfaces exert on each other when they rub against each other.
friction
This is the tendency of an object to resist a change in motion.
inertia
This is the speed in a given direction.
velocity
A softball has a _____ acceleration when it is thrown. A softball has a _____ acceleration when it is caught.
positive; negative
This is the overall force on an object when all forces are added together.
net force
This is the force that occurs when one solid surface slides over another.
sliding friction
This Law of Motion from Newton is often equated with inertia.
1st Law of Motion
The slope of a distance-versus-time graph shows an object's.....
speed
A car speeds up at a steady rate for 1 minute. How would this motion appear on a graph?
curved line on a distance-versus-time graph
This is equal forces acting on an object from opposite directions.
balanced force
This is the measure of the force of gravity acting on an object.
weight
This is Newton's second law of motion.
f = mxa
This is what a horizontal slope for a distance-versus-time graph indicate about an object's motion.
the object did not move
This is the formula for acceleration.
final speed - initial speed/time
A force is a push or a pull that is described by this.
strength and direction
These types of friction occur between your bike tires and the ground as you ride over cement, ride through a puddle, and then skid to a stop. You must name all three!
rolling, fluid, sliding
This is the formula would you use to calculate the force of an object.
f = mxa
This is the overall rate of speed at which an object moves.
average speed
A jumping spider can jump 10 - 40 times its body length. Once the spider jumps, it must accurately estimate its initial velocity. This 'force' causes it to follow a specific curved path to catch the prey.
gravity
You push on a desk with a force of 120 N to the right. Your friend pushes on the same desk with a force of 90 N to the left. This is the net force on the desk.
30 N to the right
This is what happens to the gravitational force between two objects when their masses are increased.
forces increase
Newton's second law of motion states that force is measured in kilograms times meters per second (k x m/s^2). This is the SI unit of force.
Newton (N)