PendulumsLifeboatsPlane SenseFlippers BONUS

True True or False: The weight and release position of the pendulum has no effect on the number of swings.

Shorten the string If you wanted to increase the number of times a pendulum could swing in 15 seconds, you would?

Weight, Release Position, and Length of string What were the variables that we tested during the Swingers Experiment?

Potential energy What type of energy does the pendulum have before it is released?

Slower: the longer the string, the slower the swing. If I had a string that was 200cm long, would my pendulum swing faster or slower in 15 seconds?

True or False: Scientific knowledge is absolute truth? False, it is based on observations and experiments.

What variables did we test with during our Lifeboats Experiment? Boat capacity and passenger placement

Finding the volume in milliliters is the best way to do what? Measure the capacity of a lifeboat (cup)

True or False: A boat with a capacity of 50ml will have a greater passenger load than a boat with a capacity of 25 ml. True: the greater capacity of the boat, the more passengers it will hold.

What is a variable? Anything that you can change in an experiment that might affect the outcome.

The distance a wind up plane would travel could best be measured with what? A measuring tape or meter stick (yard stick)

True or false: The smaller the weight added to the plane, the shorter the Flight. False, the smaller the weight added to the plane, the longer the flight.

The force that keeps humans as well as other objects at or near the ground is called _______? Gravity

What is friction? Friction is due to the rubbing of objects and it slows things down.

Objects in motion can be changed because of forces like: ___________ and ____________ friction and gravity

Joe recorded the number of birds in his garden on Thursday morning and the number of birds that were in his garden on Tuesday night. He concluded that there were always more birds in his garden in the morning. Do you agree with Joe’s conclusion? No, because he did not record any other days of the week.

A ________ makes a catapult work. A lever.

A ______ lets you use your own weight to help lift an object. A pulley

What is a controlled experiment? An experiment in which only one variable is changed, or tested while everything else is kept the same (controlled).

When does an object that has been released from a flipper have energy of motion ? A.When you place it on the flipper. B.When you push the flipper down. C.When you let go of the flipper. (C) The object has energy of motion right after you release it into the air.

Why do pendulums eventually stop moving? Friction and Air Resistance BONUS QUESTION