Meclanical Energy
Which of the following has the most
kinetic energy?
A. stretching a rubber band
B. a jet flying through the air
throwing a paper airplane
D. pitching a baseball
C
INS
SENES
F
11IBRE
IRST
Tilt
HIPERTIRERERTIF
I
TTI
TETE
BREITE
SAR
THIERRE FEITER
THE
TITRE
NESE
214
EEE
DELLE HHI

T
RETILI
TERSEHEHVE
CETTE
PITHEELIEBTEILULITRIIL
E
ETTERITIE
D EPPS
HELHEFTIRILATEESEEN
HILTI TITULI
HTETITELLEH
TITUTI
TIITTIILIDE
HEHEHE
ETILIHITTE

a jet flying through the air making a paper airplane

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s

drying towels at the beach