Answer:
D. The speed of the combined vehicles is less than the initial speed of the truck.
Explanation:
Ik this is late
A bond with elements from B.
Answer:
The __law__ conservation
of state that either energy may produced nor destroyed
25,000 Feet = 7620m
PE = mgh where m is mass, g is gravity accel: 9.8 n h is height
= 90 x 9.8 x 7620
= 6720840J
= 6.72MJ
F = ma where m is mass, a is accel = gravity = 9.8
= 90 x 9.8
= 882N
Accel = gravity = 9.8m/s^2
KE = 1/2mv^2 where m is mass n v is vel
if no wind resistance, PE leaving airplane = KE at net
6720840 = 1/2 x 90 x v^2
v^2 = 149352
v = 386.5m/s
150MPH=67m/s
@150MPH, his speed is not changing so accel=0
accel=0, force=0 by newton's second law
force=0 when wind resistance = gravity = 9.8m/s^2
by conservation of energy, Luke's KE = PE = mgh = 6720840J
he was unhurt cuz' his momentum was absorbed by the net
