Balance the Forces
Balloon Powered Cars
Landers
Bridges
Random
100
What is a hypothesis?
A concept or idea that you test through research and experiments
100
What is motion?
The action or process of moving or being moved
100
What is a prototype?
A first, preliminary model of something
100
True or False: Squares are typically the strongest shape
False: Triangles
100
What is a blueprint?
A design plan
200
What are forces?
A push or pull that can change the state of motion of an object
200
What is velocity?
The speed of an object in a particular direction
200
What is terminal velocity?
The maximum speed attainable by an object as it falls
200
What is gravity?
The force that pulls objects toward the center of the earth
200
Draw a trajectory of an object in motion.
Could be anything from a basketball going inside a hoop, rocket landing on the moon, etc.
300
True of False: Gravity is a push force.
False. It is a pull force.
300
Describe how the Balloon Powered Car project relates to stability & motion.
It relates to stability because your car design has to have stable and balanced wheels and axels in order to function properly. The car is only in a state of motion once you blow the balloon to thrust it forward.
300
Momentum is the product of an object's _____ and ____?
Mass and velocity
300
What is torsion?
The action of twisting or the state of being twisted
300
What is inertia?
The tendency of an object to resist changes in its state of motion
400
Describe what a balanced force is and draw an image that can represent a balanced force.
Forces that are equal in size and opposite in direction, resulting in no change of motion.
400
Draw the force arrows of an object in motion.
Student draws object with lift, gravity, thrust, and drag force arrows.
400
What is air resistance and what are some objects that have high air resistance?
A kind of friction that occurs between air and another object. Some examples are leafs, feathers, pieces of paper.
400
True or False: Compression is a pull force.
False, it is a push force
400
Draw an example of a pulley system and explain.
Examples include flag on a flagpole, sailboat masts, elevators, wells (hoist a bucket out of a well, curtains at a theatre, etc.
500
Explain how the Suspends activity and the Imagination Kit (Towers) activity are similar.
Both activities are about balance and balancing pieces in order to continue forward with each project. For Suspends, you had to match equal and opposite forces on either side to get your parts to balance. For the Imagination Kits you wanted to make sure that you were building the tallest tower by balancing your materials as you built up and that your tower was not off-center.
500
Describe the different forces we saw in the String Balloon Rocket activity we did.
The balloon air was used to thrust the rocket forward, the string provided lift, gravity was also pulling down on the balloon, and drag could be the air going against the balloon AND THE FRICTION of the straw and string.
500
Explain how friction (air resistance) relates to the Landers project that we did.
It relates to the Lander project because you are accounting for air resistance while building. For example, one way the Lander project can be successful is if it was built with greater air resistance such as using a whole sheet of paper to increase friction between the air and your project, allowing it to fall more slowly. Additionally, when dropping your Lander, the friction that is acting on it is the air.
500
Draw a bridge with the compression and tension force arrows
500
What is the force that always acts opposite to the direction of an object in motion?
Friction