Question

Hi

請問第七題怎麼解

60 s, turn 90
20 km/h for 2.0 min, turn 90° to the
point, (a) how far are you from your starting point, and
what direction relative to your initial direction of travel are you?
V During volcanic eruptions, chunks of solid rock can be blasted
out of the volcano; these projectiles are called volcanic bombs.
Figure 4-22 shows a cross section of Mt. Fuji, in Japan. (a) At
what initial speed would a bomb have to be ejected, at angle
0o = 60.0° to the horizontal, from the vent at A in order to fall at
the foot of the volcano at B, at vertical distance h = 2.60 km and
horizontal distance d = 9.40 km? Ignore, for the moment, the
effects of air on the bomb's travel. (b) What would be the time of
flight? (c) Would the effect of the air increase or decrease your
answer in (a)?onatlar slow orl w moito Movisio
Olovo vibolov te tootsodio dos olvistatani
se moltotib nur no vodo as vd botu 29
vd baidot otsi
Nomstl moll bottom
12 A plane flies 5
then 1100 km sout)
trip, what are the
displacement, the
velocity, and (e) is
13 An astronau
of 4.5 m. (a) Wha
eration has a ma
minute are requ
period of the m
14 A basebal
mum height al
after reaching
that is 86.0 m
(a) What may
ball? (b) How
the ball strike
blitt
00
Troede
Vibolov
sister
sam
12
d
B
15 The ran
also on the
place to plac
broad jump
(where g=
by how mu
instead in 1
Figure 4-22 Problem 7.
8 Oasis A is 90 km due west of oasis B. A desert camel leaves A
and takes 55 h to walk 75 km at 37° north of due east. Next it takes
45 h to walk 65 km due south. Then it rests for 5.0 h. What are the
(G) magnitu
Cia