HOW MUCH FORCE CAN AN EGG WITHSTAND?
Procedure: hit the egg with the force sensor and repeat it each time with more force until the egg breaks
Mass of Egg: 59.804 grams
Minimum Force: 10.800 Newtons
Initial Velocity: 54.67 m/s
Final velocity: 0 m/s
HOW MUCH FORCE DOES THE WALL DELIVER TO THE CART?
In order to find the impulse of the collision of the cart with the wall (without all the materials applied) , we would have to use the velocity sensor to find the initial velocity. We will multiply the mass times the velocity to find the initial momentum. The final momentum (0) minus the initial momentum is equal to the impulse of the collision.
We attached the force sensor to the cart and then slid it down the ramp. With the LabQuest, the force detected when hitting the ramp was 65.79 N, which will result in the same force because of Action-Reaction.
When applying the egg to the cart, there is more mass, which will result in more momentum and more impulse. So, the force will increase. When applying more mass on the cart to protect the egg, depending on the materials, the time will increase on the impact, so the force won't be felt so hard for the egg. In general, adding mass will increase the momentum.
For the egg to survive the impact of the wall, the collision should take a longer time. This is because when increasing the time interval, the force felt is less. J= F x t
For the egg to survive the impact of the wall, the velocity should be low, and therefore it changes its momentum. p= m x v
To make the collision have a smaller effect on the egg, we cut styrofoam into small pieces and place them inside a plastic container. After the plastic container was filled inside, we attached a small balloon on the front of the car. Finally, we placed pieces of styrofoam to the bottom of the car so that the velocity may decrease.
We used cloth, styrofoam and some tape to fill the plastic container.
Styrofoam in container: we placed styrofoam inside so that the egg can travel through more air, instead of being compressed.
Balloon: we placed a small balloon to the front of the cart to increase the time of the impact and make it bounce softer, instead of having a hard impact.
The velocity that the cart hit the wall is: 54. 678 m/s
The mass of the cart (without egg ): 0.4249 kg
The momentum of the car: 23.23 kg m/s
The change of momentum: -23.23 kg m/s
Impulse of the cart: 0.65 Ns
The force that the cart hit the wall: 28.73 N
Time of impact: 0.022 seconds