6 Projectile Quantities Accelerationax = 0 m/s2 (no horizontal acceleration)ay = m/s2 or “g”Time (s)t = time- Does not depend on direction (scalar)- It is the same for horizontal and vertical components
7 Projectiles and Time(i.e.) A projectile has the same time for how long it goes up and/or down AND left or right
8 different distances each second. Yes, constant 9.81 m/s/s, downward QuantityHorizontalComponentVertical ComponentDisplacementYes,same distanceeach seconddifferent distances each second.VelocityConstantYes, changingby m/s each second.AccelerationNoYes, constant 9.81 m/s/s, downward“g”
10 Projectile ExampleWhat happens to a projectile’s horizontal and vertical displacement, velocity and acceleration?Example: An object with a initial horizontal velocity of 20 m/s to the right and vertical velocity of 0 m/s.
11 Displacement Time Horizontal Displacement Vertical 0 s 0 m, right 0 m 5 m, down2 s40 m, right20 m, down3 s60 m, right45 m, down4 s80 m, right80 m, down5 s100 m, right125 m, down
12 Velocity Time Horizontal Velocity Vertical 0 s 20 m/s, right 0 m/s 1 s 10 m/s, down2 s20 m/s, down3 s30 m/s, down4 s40 m/s, down5 s50 m/s, down
13 Acceleration Time Horizontal Acceleration Vertical 0 s 0 m/s/s 10 m/s/s, down1 s2 s3 s4 s5 s