Let’s consider the projectile diagram. The object is launched from point A, at the origin. It reaches the ‘ʘ’ mark B after exactly 1 second has passed. Mark C is reached after exactly 2, mark D after exactly 3, and mark E after exactly 4 seconds.
In our case, since we’ve placed the origin at A, we have x_0=0 and y_0=0. (Note that this would NOT be true if we had instead put the origin somewhere else, say at the man’s feet).
It is important to realize that the projectile is NOT at rest anywhere along the trajectory:
at A it is moving at the intial speed v_0, at the maximum height it is moving horizontally, and just before it strikes the ground, its faster.

Part 1 A Projectile’s Horizontal Motion

Task 1 Click on the link https://phet.colorado.edu/sims/html/projectile-motion/latest/projectile-motion_en.html to lauch the simulation Projectile Motion. Use the simulation to produce the trajectory according to

Initial Values
Height (m) 15 m
Angle 74°
Speed (m/s) 18 m/s


Check if Gravity = 9.79m/s

Change initial speed ‘Vo’ and angle ‘θ’ as provided above.
Click to launch. You can zoom out to view as in Fig1.
Record the following from simulation with its appropriate unit

Projectile range = final horizontal displacement = 21.0m

Task 2 For the motion of your projectile, calculate the horizontal displacment from the origin at each of the points C, D and E along the trajectory, as indicated.
Show work and record your values.
Vo = …………………………. θ = ………………………………

Vox =