SCIENCE 121 PRACTICE ASSIGNMENT #2
ANSWER SHEET
To find Velocity formula equals
Vf=?, Vi = 15.68m/s, a = - 9.81m/s2, t = 0.4s, a=g=9.81 upward (9.81 if downward)
Vf = Vi + at
Vf = 15.68 + (-9.81 × 0.4)
Vf = 11.76m/s
To find the height
d =?, Vi = 15.68m/s, t = 0.4s, a = - 9.81m/s2
d = Vit + at2
d = (15.68×0.4) + 0.5(-9.81 × 0.42)
d = 5.49m/s2
TIME IN AIR
VELOCITY (m/s)
HEIGHT(m)
0
15.86
0
0.4
11.76
5.49
0.8
7.83
9.41
1.2
3.91
11.75
1.6
0
12.54
2
3.92
11.76
2.4
7.84
9.41
2.8
11.76
5.49
3.2
15.68
0
A. 3.2s
B. 1.6s
C. 1.6s
D. The time it takes for the ball to reach the maximum height is equal to the time it
takes to fall back down.
Question 2
Question 3
QUESTION 4