# Physics Lab Report Essay

825 Words4 Pages
Physics Lab Report

Name – Shaurya A Singhal
I.D – 13229
Grade – 12
Investigating the effect of the angle of incidence on the diameter of a Crater formed by a falling object

Introduction
When a bob is dropped into sand, a circular crater is formed due to the impact of the ball. The size of the crater varies with numerous factors, Mass of falling object Angle of incidence Velocity of object Rigidity and Tensile Strength of surface on which object falls
Background Theory
When a high-speed object strikes a surface, it produces an enormous amount of energy. This is called kinetic energy because it is caused by motion. The amount of energy produced in this way depends on the mass of the impacting object and the velocity with which it strikes the surface:
KE = ½mv2, where m is the mass of the object and v is its impact velocity. Asteroids hitting Earth have impact velocities from about 11 to 25 kilometres per
…show more content…
Trial No. Angle of Incidence Diameter of Crater

To get the energy of the bob, use the formula[(mgh cos⁡〖θ)+(1/2 mv^2)]〗, as the total energy is the gravitational potential energy + kinetic energy, Ek.
Take out the energy given from the slingshot onto the brass bob. For that, take the spring constant of the slingshot k, and along with the extension, x, calculate the Ep of the slingshot, by1/2 kx^2, and then subtract it from the overall energy of the bob.
After having found out the energy, substitute all the values in the formula, and then get the value for the diameter of the crater.
Safety Precautions Ensure that the slingshot is held properly and that the stone doesn’t actually hit a student. There shouldn’t be any wind blowing otherwise the sand could blow into somebody’s eyes.
Bibliography