Physics 1C
Worksheet #5 - Velocity, Acceleration & Freefall
Name:
1. A ball is thrown straight upward with an initial velocity of 144 ft/sec. Draw a diagram and label time and
velocity every second.
a) Graph the motion of the ball.
b) Find the total time the ball is in the air.
x
t
c) Find the velocity of the ball in ft/sec at 7 seconds.
v
d) Find the maximum height of the ball in feet.
t
e) Find the height of the ball above ground in feet at 7 seconds.
a
t
f) Show a check for #d and #e using a different equation.
#d
#e
2. A ball is thrown straight upward and is in the air for a total time of 7 seconds. Draw a diagram and label
time and velocity every second. Use g = -9.8 m/sec2
a) Find the initial upward velocity of the ball in m/sec.
b) Find the velocity of the ball in m/sec at 5 seconds.
c) Find the maximum height of the ball in meters.
d) Find the height of the ball above ground in meters at 5 seconds.
3. A bicycle starts from rest and accelerates down a hill. It reaches the bottom of the hill in 8 seconds with a
final velocity of 24 ft/sec. It continues at 24 ft/sec for another 3 seconds then braking to a stop in 6 seconds.
The bicycle is in motion for a total time of 17 seconds.
a) Label time and the corresponding velocity for every second on the diagram below.
8 sec
17 sec
11 sec
b) Find the acceleration of the bicycle.
x
c) Find the velocity of the bicycle in ft/sec at 3 seconds. Use Diagram.
t
d) Find the velocity of the bicycle in ft/sec at 13 seconds. Use Diagram.
e) Find the distance traveled by the bicycle from 3 to 8 seconds.
v
t
f) Find the distance the bicycle traveled from 8 to 11 seconds
a
g) Find the distance the bicycle traveled from 3 to 13 seconds.
t
h) Graph the motion of the bicycle. The first dotted line is 8 seconds, the second dotted line is 11
seconds and the third dotted line is 17 seconds.
Answers:
1.
2.
3.
b)
a)
b)
f)
9 seconds
34.3 m/sec
3 ft/sec2
72 feet
c) -80 ft/sec.
b) -14.7 m/sec
c) 9 ft/sec
g) 194.5 feet
d) 324 feet
c) 60.025 meters
d) 16 ft/sec.
e) 224 feet
d) 49 meters
e) 82.5 feet