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Activity 3: Find me
Read the problem below and find the answer.
1. The diagram below shows the trajectory of a horizontally launched
projectile. Positions of the projectile at 1-second intervals are shown.
Demonstrate your understanding of the components of the
displacement by determining the horizontal displacement (y) and the
vertical displacement (2) after 4 seconds.
2. If the ball in the diagram above strikes the ground after 4 seconds,
then, (please use the information you have written on Figure 6)
a. How high was the cliff?
b. How far from the base of the cliff will the ball land?
Y component 0
50
100
150
200
250 m
t = Os
t = 1s
t=2s
t = 3s
t = 4s
X-
meters
Y-
meters
X component
Redraw the diagram in a separate sheet of graphing paper. Show its
horizontal and vertical displacements at every second of its fall.
Activity notes/ Hints
Write and show your solution on a separate sheet of paper. Equation to
use for letter A problem v 2 = 0,2 +2ad ---dy
For letter B problem; dx = Vx.t
=
Activity 3: Find me
Read the problem below and find the answer.
1. The diagram below shows the trajectory of a horizontally launched
projectile. Positions of the projectile at 1-second intervals are shown.
Demonstrate your understanding of the components of the
displacement by determining the horizontal displacement (y) and the
vertical displacement (2) after 4 seconds.
2. If the ball in the diagram above strikes the ground after 4 seconds,
then, (please use the information you have written on Figure 6)
a. How high was the cliff?
b. How far from the base of the cliff will the ball land?
Y component 0
50
100
150
200
250 m
t = Os
t = 1s
t=2s
t = 3s
t = 4s
X-
meters
Y-
meters
X component
Redraw the diagram in a separate sheet of graphing paper. Show its
horizontal and vertical displacements at every second of its fall.
Activity notes/ Hints
Write and show your solution on a separate sheet of paper. Equation to
use for letter A problem v 2 = 0,2 +2ad ---dy
For letter B problem; dx = Vx.t
=
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Answers & Comments
Problem 1.
x = 200 meters y=100meters
Problem 2.
Given for Question A
a) a = 9.8m/s²
b) vi = 0
c) vf = 39.2m/s²
vf² = vi² + 2ad
(39.2m/s)² = 0 + 2(9.8m/s²)
1537m/s² = 19.6m/s² (d)
Given for Question B
a) vx = 25m/s
b) t = 4 seconds
vx = dx/t
25m/s = dx/4sec
dx = vx (t)
= 25m/s(4sec)
= 100 meters