How can Newton's laws be applied to protect a smartphone screen during a collision? People carry smartphones everywhere. If people are not careful, they can drop or bump their
smartphones into other objects. Smartphones may be damaged in a collision.
1. Oh no! Have you ever seen this problem with a smartphone or a tablet? How do you
think cases help protect smartphones and tablets from damage?

smartphones break due to forces acting on the material.

force causes material to deform.

material is often brittle and cracks due to a limit on hardness / electricity in screens.

newton's 2nd law states

force = DV / DT

to help phones we must slow down change in momentum to reduce the force

thus we must use some form of damping in the form of a case .

the case is typically able to deform and rubber is elastic converting the kinetic energy to heat as it deforms instead of transferring it through the screen.

therefore the change in velocity occurs over a longer time. therefore the impulse decreases