Newton's 3rd Law
For every action there is an......
Equal and opposite
Anything that has ---- also has gravity
mass
What is motion
– the change in an object’s position with respect to time and in comparison to the position of other objects used as reference points
when mass decreases the kinetic energy --------
decreases
A ball is hit up in the air. At its highest point the ball has the _____________ amount of potential energy. Right before it hits the ground it has the _______________ amount of potential energy
A) Greatest; smallest
When a book sits on a table, there two forces become balanced and prevent the book from falling off the table. This is called
a balanced force
the ------- the distance between two objects, the ----- gravitational force there is
greater, less
forces can cause a change in motion and -----
direction
What 2 factors affect kinetic energy?
Mass and Speed
A system of objects can contain both _______________ energy and ______________ energy
Kinetic; potential
Gravity dose what to objects
pulls them down
who discovered gravity
sir Issac newton
when an object is not moving ----- is at its greatist
Potential energy
Kinetic energy ___________________ as speed ___________________.
increases/increases
_______________ potential energy depends on its distance from the ground. The potential energy decreases the _____________ the object is to the ground.
Gravitational; closer
Two objects forces are ------ when pulling on eachother
equal
--------- between two objects affects the gravitational force
Distance
what is motion
Motion is the change in an object’s position with respect to time and compared to the position of other objects used as reference points.
_________ is also known as motion energy
Kinetic
Imagine you are at a playground with a slide. At what point on the slide does your kinetic energy increase while your potential energy decreases?
As you begin to move downward from the top of the slide
When a book sits on a table, the book exerts a downward force on its surface, while the table exerts an upward force on the book. there are two forces resulting from this interaction: a force on the book and a force on the table. these two forces are also called
aciton and reaction forces.
Many planets in our solar system (Saturn, Uranus, Neptune) have rings. If these rings are made of chunks of debris, why do they form around the planet and not travel toward the Sun?
the rings are closer to the planet, so the gravitational pull is stronger
what is the equation for speed/velocity
speed = distance/time
Determine the kinetic energy of 500 kg pick-up truck traveling at 5 m/sec.
6,250J
If you want to increase an object’s potential energy, what two things could you change?
Increase its height and mass