Physical Science Study
What is a force?
A force is a push or pull.
Projectile Motion
Projectile motion is a form of motion in which an object or particle is thrown near the Earth's surface, and it moves along a curved path under the action of gravity only.
Straight Line Motion/Linear Motion
a one dimensional motion along a straight line, and can therefore be described mathematically using only one spatial dimension.
Definition of Relative Location
a point or place in relation to another point or place.
What does the slope of a velocity-time graph indicate?
acceleration
How are acceleration, time, and velocity related?
acceleration describes how the velocity of an object is changing with time
What is acceleration?
acceleration is the rate of change of velocity.
What are three ways an object can accelerate?
an object is accelerating if it speeds up, slows down, or changes direction.
Why is there friction between objects?
because of micro welds
How is the motion of two objects relative to each other described?
by a reference point.
State in words how acceleration is calculated.
change in velocity (final velocity minus initial velocity) divided by time
Circular Motion
circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. (a motion that moves towards the middle of an object)
How is an object's speed calculated?
distance divided by time s= d/t
How are distance and displacement different?
distance is the amount the object traveled from its starting point. displacement is the distance and direction of the objects change in position.
When is an object accelerating?
it accelerates when it changes its speed and/or direction.
Give two ways the unit for acceleration can be written.
meters/second/second; meters/second2
What term refers to the product of an object's mass and velocity?
momentum
What is the equation for momentum?
momentum= mass x velocity p= m x v
What information does a distance-time graph provide?
motion of an object over a period of time.
How is the net force on an object determined?
net force is the sum of the forces on a single object.
What is the difference between positive and negative acceleration?
positive acceleration occurs when an object's speed increases; negative acceleration occurs when an object's speed decreases.
What is the difference between speed and velocity?
speed only describes how fast an object is going while velocity includes the speed of an object and its direction.
Definition of Momentum
the quantity of motion of a moving body, measured as a product of its mass and velocity.
While traveling in a car, why do cars that pass by appear to be moving slowly?
the reference point is the car which is traveling in the same direction.
Definition of Velocity
the speed of something in a given direction.
How are force and motion related?
unbalanced forces change motion
How can velocity change even if speed stays the same?
velocity can change if an object changes direction because velocity depends on both the speed of the object and the direction of its motion.
What causes a change in velocity?
velocity changes when the object speeds up, slows down, or changes direction.
What is the difference between mass and weight?
weight is a force, and mass is a measure of the amount of matter an object contains.
