Scientific Method
What is a hypothesis?
An educated guess.
distance/time
A change in position is defined as what?
motion
What is another name for Newton's first law?
The law of inertia
What is the difference between kinetic and potential energy?
Kinetic is moving energy, potential is stored energy.
If you wonder about something that you have noticed with your senses, what part of the scientific method is this?
observation
What is the difference between distance and displacement?
Displacement has a direction and distance does not.
Gary sprints 100 m in 25 seconds. What is his average speed?
4 m/s
If a car is being pushed along the road and more weight is added to the car, what will happen to the speed of the car?
It will slow down.
The sum of kinetic and potential energy of the particles in an object is what?
Thermal Energy
April changes in ingredient in her baking to see if it improves the flavor. What variable would this be in a scientific experiment?
independent variable
Jack walks 5 m north, then 4 m west, then 5 m south. What is his distance traveled?
14 m
What are the three ways something can be accelerate?
speeding up, slowing down, and changing direction
What is the formula for Newton's 2nd law?
F=ma
Thermal energy flows from ____ temperature objects to ____ temperature objects.
When testing a new medicine, group 1 gets a sugar pill and group 2 gets the new medicine. Which is the control group?
Group 1
Parker runs 15 m east, turns around and runs 20 m west. What is his displacement?
5 m west
Can a change in velocity change acceleration?
Yes
Two sumo wrestlers collide and they both bounce backwards. What law does this represent?
Newton's 3rd law
A 100 kg rock is sitting on top aof a cliff that is 10 m high. What is its GPE?
9,800 J
What is the thing measured in an experiment called?
dependant variable
John walks 5 m east, then walks 4 m north, and then walks 5 m west. What is his displacement?
4 m north
a car goes from rest to 60 m/s in 10 seconds. What is its acceleration?
6 m/s2
Define inertia.
An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by a force.
A 10 kg bowling ball is rolling at 5 m/s. What is its kinetic energy?
125 J