Forces & Motion
An object that is sitting still has balanced/unbalanced forces acting on it.
Balanced
True or False: Increasing the height from which a ball is dropped will increase the amount of stored energy.
True
True or False:
Playing the Drums is an example of momentum.
False-Collision
Stored energy is known as __________________.
Potential Energy
_______________ is a change in an object's position.
Motion
Dana is the pitcher for her community baseball team. What force causes the baseball to change direction when it is hit by the bat?
The batter's force on the ball with the bat.
Suppose you are riding a bike. As you increase speed, your energy of motion increases/decreases?
Increases
True or False:
In elastic collisions, such as Newton's cradle, there is no loss of energy of motion from the system.
True
A change in velocity over time is called _________________________.
Acceleration
_______________________ describes how easy or difficult it is to stop a moving object.
Momentum
What causes heat when rubbing your hands together?
Friction
The ____________ energy of a roller coaster is the energy of its motion
Kinetic
_____________ during a collision causes some kinetic energy to be changed into heat and sound energy.
Friction
_________ ____________ is the movement of energy from one object to another.
Energy Transfer
When you increase the ___________ of a ramp or squeeze a spring with your fingers, you are increasing potential, or ________ energy.
Height; stored
Objects in motion tend to stay in motion because of the property of
Inertia
True or False: A rollercoaster gains potential energy as it is pulled to the top of the hill.
True
Energy is ____________________; it cannot be created or destroyed.
Transferred or transformed
____________ is the ability to do work.
Energy
Tendency of an object, such as a passenger, to stay in motion during a vehicle collision until acted on by an outside force is known as ______________.
Inertia
If you drop a rock in a lake, the rock will slow down because the water exerts___________.
If you jump out of an airplane and deploy a parachute it will slow your descent to Earth because of _________________.
Drag forces or Air resistance
True or False:
When observing Newton's cradle you notice that as kinetic energy decreases, potential energy decreases.
False
The more momentum an object has, the more ______________ it possesses.
Energy
The law of ______________ _____ __________ states that energy cannot be created or destroyed, it can only change form.
Conservation of Energy
The amount of kinetic energy an object has depends on the objects mass and __________.
Speed