MEASURING MOTION
An object in motion is moving in relation to an object that appears to_______.
Stay in place.
In science a push or a pull is a(n)_______.
FORCE!!!!!!!
If a baseball and and marble are dropped at the same time from the same height which ball would hit the ground first according to Aristotle? EXPLAIN!!!!!!!
They would land at the same time because of acceleration due to gravity.
Which law is...An object at rest remains at rest and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
1st!!!!!!!
When air resistance exactly matches the downward force of gravity a falling object stops accelerating and reaches_______.
Terminal Velocity.
When an object changes position over time relative to a reference point the object is_______.
Moving.
ANY change in motion is caused by a(n)_______.
FORCE!!!!!!!
What Italian scientist argued that the mass of an object does NOT effect the time the object takes to fall to the ground?
Galileo Galilee.
How could an unbalanced force work on a chair at rest on the floor to make it slide across the room?
Push the chair.
An object at rest tends to remain at rest. This property is called_______.
INERTIA!!!!!!!
For determining motion the surface of Earth is a common_______.
Reference Point.
Force is expressed by the unit called the_______.
NEWTON!!!!!!!
On what 2 factors does acceleration depend?
Force and Mass.
What does friction do to the motion of objects?
It makes the motion of objects change.
ONLY in a vacuum or space can an object be in_______.
FREE FALL!!!!!!!
Why are buildings,trees,and mountains ALL useful reference points?
Because they stay in place.
Force ALWAYS acts on a(n)_______.
OBJECT!!!!!!!
The rate at which velocity changes over time is called_______.
Acceleration.
What is the tendency of an object to resist being moved or if the object is moving to resist a change in speed or direction until an outside force acts on the object.
INERTIA!!!!!!!
A car accelerating from 60 km/h to a constant speed of 80 km/h has increased its_______.
MOMENTUM!!!!!!!
Can a moving object be used as a reference point?Explain.
YES!You can see motion in relation to the other moving objects motion.
The combination of ALL forces acting on an object is_______.
Net Force
The force that apposes the motion of objects through air is_______.
Air Resistance.
What happens to the acceleration of an object as its mass decreases?
The acceleration will increase.
If three balls of Steel,Rubber,and Plastic were dropped at the same time from the same height which would hit the ground first?(assume there is NO air resistance!!!!!!!)
ALL would hit at the SAME TIME!!!!!!!