unit19

Unit 19 is about gravitational force and frictional force . In unit 19 we made a parachute and we read many pages of explanation text and do self check.Frictional force can cause problem on car engine to overheat and causes a car to stop.I learned how tread patterns on shoes and car tires could save a person's life ,how fingerprints could help grip something , gravitational force could pull divers downwards,could speed up a skier in the hill skiing ,could pull things down that is all for sumarising unit 19  

making of parachute

As you can see I am making a parachute with plastic bag ,strings and it is tested with a toy( launch the parachute  with a toy tied to it). The making of the parachute ,the objective is to make air resistance and to show how gravitational force work.It was fun making the parachute and launching it to bad my parachute didn't open so it just fall down to the directly to the ground.To be honest I got jealous  of others parachute because my parachute didn't work its like I want to destroy other's parachute but somehow I just keep it inside because  I want a 9 or a 10 in six pillars.