Thermal Energy
Thermal Energy Transfer
Speed and Velocity
Interpreting Distance Time Graphs
Newton's Laws
100
What is thermal energy?
The total kinetic energy of the particles in an object.
100
What process transfers thermal energy through direct contact?
Conduction.
100
What is the difference between speed and velocity?
Velocity includes direction; speed does not.
100
The graph represents the movement of a cat over the period of 4 seconds. What does the graph tell us about the cat's movement from 1-2 seconds?
The cat remains still during that time.
100
What is Newton's First Law of Motion?
An object in motion will stay in motion an object at rest will stay at rest UNLESS acted upon by an outside force
200
What happens to particles as temperature increases?
They move faster and spread apart.
200
How does thermal energy flow in a system?
From warmer objects to cooler objects.
200
Calculate the average speed of a turtle that travels 25 meters in 16.8 seconds.
Average speed= 25m/16.8s ≈1.49 m/s
200
Between what 2 points is the cyclist moving the slowest?
Between B and C
200
Which of the following is an example of an object experiencing balanced forces?
A rock sitting still on the ground.
300
What is thermal expansion?
The increase in size of an object due to an increase in temperature.
300
What happens when a hot object contacts a cold object?
Thermal energy is transferred from the hot object to the cold object to reach a state of equilibrium.
300
What is the formula to calculate average speed?
Average Speed=Distance/Time
300
How far did the cyclist travel throughout the entire journey?
160 m
300
If an object is in motion and no unbalanced forces act upon it, what will happen to the object?
It will continue moving at a constant speed and direction.
400
What is the main factor that temperature measures in a substance?
the kinetic energy of particles
400
Models are great ways of representing complex ideas with a simple representation. An example of this is the model below of the layers of the Earth.
In the diagram, how is the heat being transferred?
Convection
400
Liam watched the fire engine race down the street with its sirens blaring. As it turned north, the fire engine slowed slightly to make the turn. How did the turn affect the motion of the fire engine?
The turn changed the speed and velocity of the fire engine.
400
How far has the cyclist travelled between points A and B?
30 m
400
Team 1 and Team 2 are playing a game. They want to find out which team can push a box the hardest. The players on the teams start pushing on opposite sides of the box. Both teams push with the same amount of force. What will happen?
The box will not move.
500
A teacher performs a demonstration for their class using a metal ball and ring like the one in the picture.
The teacher asks the students to explain what happens to the ball from step 1 to step 3. Explain what will happen.
The particles in the ball gained kinetic energy when the temperature increased, and this caused them to spread out and increase the size of the ball.
500
During a warm summer day, a car became extremely hot. When a student went to open the car door, he burned his fingers.
What TWO methods of heat transfer were responsible for the student burning his fingers?
radiation and conduction
500
Anya and Miranda discussed the high-speed train they would take across the country. Anya said the train's speed was 185 mph eastbound, but Miranda said the train's velocity was 185 mph eastbound. Decide whose train description is correct and why.
Miranda is correct because velocity includes direction.
500
What equation would calculate the average speed between points A and E?
80 m divided by 18 s
500
Six friends are playing a game of tug-of-war. They are split evenly into two teams so the same number of people can hold on to each side. A flag is tied to the center of a rope. Each team pulls on one side of the rope and tries to move the flag to their side.
As the game of tug-of-war begins, the teams begin to tug, and the flag starts moving toward the team on the right.
Describe what is occurring in relation to Newton’s First Law?
The team on the right is applying more force to make the forces unbalanced.