Wednesday 10 March 2010

Speed, Velocity and Acceleration Relationships

Speed, velocity and acceleration are all connected. Speed is how fast. Velocity is speed in it's direction. And acceleration is the changes in speed, and the speed of those changes. Terminal velocity is when the velocity stops going in a direction, and heads back to the starting point, and stops, hence the term "terminal". Gravity is a force which makes all objects of mass, to have a certain height above the center of gravity, or grounds of planets. In a car race, speed is how fast the car was going (e.g 150 km/h, velocity 150km/h forward, and acceleration 1-150 km/h in 5 seconds.)





Inclined Plane Worksheet (Group Could Not Finish Sir)

a. length = 0.25 m
height = 0.25 m
1. 3.22
2. i. = 3n
ii.= 1.5n
3. 2n
b. length = 2m
height = 0.17 m
1. 2.85n
2. i. = 3.84 n
ii.= 1.5n
3. 2.56

Friday 5 March 2010

Speed and Weight on the Moon

I ran 10 meters in 2.75 seconds, and walked 10 meters in 4.01 seconds. I can calculate my speed by dividing my distance by my time (d/t=s). My running speed is 10/2.75 which approx. = 3.63, so my running speed is approx. 3.63m/s. While my walking speed is 10/4.01 which approx. = 2.5, so my walking speed is approx. 2.5m/s.

My weight is different on other planets because the other planets have a different mass to the earth, and have different levels of gravity based on that, to affect my weight.