# Cool Labs

##### Conservation of Energy: Racing Marbles

A marble will roll on different paths, starting and ending at the same height. Students will predict and then measure the final velocities of the marble. Ramp A is the nearly horizontal ramp, and Ramp B dips down in the...

##### Horizontal Projectile

Students will use a simple method, employing just a meter stick and stopwatch, to determine the initial velocity of a horizontal projectile. They will then predict the range of the projectile, precisely measure the actual range by using carbon paper,...

##### Racing Marbles: The Race

Two marbles will roll simultaneously on different paths, starting and ending at the same height. Students will predict and then observe the results of a "race" between the two marbles, and explain the results. Quantitative analysis of the motion will...

##### Range of an Angled Projectile

The Air-Powered Projectile uses compressed air as fuel to power its launch. One of four thrust washers (sizes Low, Medium, High, and Super) is pressed onto the top of the launcher and the projectile slides down the launching tube. Air...

##### Range of a Horizontal Projectile: Advanced

Students will use a photogate to measure the launch velocity of a horizontal projectile. That velocity will be used to predict the projectile's range, or horizontal displacement. Students are guided through the exact steps and equations they will need for...

##### Range of a Horizontal Projectile

Students will use a photogate to measure the launch velocity of a horizontal projectile. That velocity will be used to predict the projectile’s range, or horizontal displacement. The Marble Projectile Ramp is used to launch a marble horizontally from a...

##### Spark Timer Motion

Students will use a spark timer to record the motion of two toy cars. The spark timer produces a physical record of the motion by making a mark on tape at set intervals. Students measure the distance between the marks...