# 4 experiments to learn about Force and Energy on Lab4Physics

Mar 1, 2018 · 3 min read

Lab4Physics is an educational innovation that helps students learn physics by conducting experiments using their mobile devices as lab instruments.

Below, we show you some examples of the experiments you can do with the Lab4Physics app. All the experiments come with images and easy-to-follow instructions available in both, the app and in the Teacher Portal!

1. Bungee jumping

In this experiment, students will learn about Hooke’s Law. To do this experiment, students will construct a mini bungee using simple and accessible materials such as a clear plastic bag, a spring or rubber band, and their own device. Students can use the Lab4Physics accelerometer to measure the experimental period of the bungee and then compare it with the theoretical period of the bungee according to Hooke’s Law.

Physics concepts: Hooke’s Law, force, restoring force, spring constant, mass, acceleration, oscillation period.

2. Skatepark

In this experiment, students will understand how friction affects the acceleration of their device on an inclined plane. To do so, students will turn their device into a skater that slides down a ramp with different kinds of surfaces. To do the experiment, students will need to construct a ramp using reused cardboard, a blank sheet of paper, sandpaper, a piece of plastic (bag or plastic wrap), masking tape, and use the Lab4Physics accelerometer to take the measurements.

Physics concepts: friction, acceleration, contact surfaces

3. How fast can you slide?

In this experiment, students will test Newton’s Second Law, which demonstrates the relationship that exists between force, mass, and acceleration. Using the Lab4Physics Accelerometer tool, they’ll measure the acceleration experienced by the device as it’s dragged off a table by a bag of weights. By varying the masses students use in the experiment, they’ll also obtain different accelerations, and they’ll discover that the acceleration is greater if the force of tension is greater, provided that the mass experiencing the acceleration remains constant.

Physics concepts: force, mass, acceleration, Newton’s Second Law

4. The Great Collision

Using a real life scenario, students will learn about the Conservation of Linear Momentum. To do this experiment, students will need two equal masses — which can be marbles or tennis balls — a tape measure, a scale to measure the masses, markers, and a track (approximately one meter long) that the masses can slide down. For this experiment, they’ll use the Lab4Physics video tracker to record and track the elastic collision.

Physics concepts: conservation of linear momentum, velocity, and mass

If you’re interested in learning more about Lab4Physics, send us a message here

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