When an object is dropped, it has an initial velocity at 0m/s. However, everything on earth is being acted on by the force of gravity will cause an object that is dropped to accelerate downward at a rate of 9.8m/s. When an object is being dropped from a known height the equation ∆d=viT+1/2 at can be used to calculate the time it will take for the object to hit the ground. The equation can also be used to to caculate the time the object will pass through any point above he ground, as long as the distance from the dropping pint is known.
The definition of constant velocity is that the object will cover a certain number of meters every second. Given the velocity and distance to be covered, the equation v=d/t can be used to caculate how much time object will take to get from start point to end point.
Once both of these times have been calculated, they can be compared to determine to the exact moment an object needs to be dropped to collide with an object moving at a constant velocity below.
Based on the information that the bleachers are 4.19m high, Ms.Hanna has a stride that is 61.5 cm long, Ms.Hanna will walk at 105 steps per minute and Ms.Hanna is 1.68m tall, the balloon needs to be dropped 7.01 seconds after she begins walking to hit her on the head. The balloon will be dropped at this time and data will be recorded to determine if the goal of hitting the teacher on the head has been achieved.
Materials
-Water Balloon
-Bleachers
-Timer
-Victim (Ms.Hanna)
Procedures
-One person designated in your group is timer and stands on the opposite side of the press box of your designated water balloon dropper. The
