Download Kinetic Energy - Introductory Physics - Solved Paper and more Exams Physics in PDF only on Docsity! MAY. 16. 2003) 1:44°M JG, FHYETES NG 3617 Fd
1) A ball with mass m, = 2 kg is thrown horizontally, off the top of a mountain at a height
h = 100 m above the ground, with an initial velocity y = 20 m/s. The ball lands in a box
with mass m, = 4 kg on the ground in an inelastic collision. The vertical component of the
ball’s velocity is absorbed by cushioning in the box, but the box slides horizontally, with
uniform deceleration over a distance d = 10 m until stopped.
=
Vv
nm e—»
h a
——y
Ls
SSS Perr
a) How Jong is the ball in the air?
b) How far d e ball trav. i ly in the air?
c is the kinetic of the ball as it hits the box?
at is the c ient of friction © box with the ground?
a) h>Ygt™ £2 Jao + (aes |
b) =u = fgom\
o) Eerges wnor = fox TI
ad) a0 + ary
Ye (Myr mefu y= A Cranjgd
A= dtr |
MAY. 16. 2003) 1:44°M JG. THYELSS NOS61? oF 2
2) A mass m = 50 kg is placed at the end of a massless rod (of length L = 2m). The rad is
supported by a massless cable (extending from the wall, connected at the end of the
rod, and at an angle of 30° to the horizontal) and by a pivot point (at the wall).
co
a) What is the jon.in the cable?
What is the magnitude direction of the e éxerte wall on the rod at
pivot point?
c i and the ings into the wall, and then i
t= 0.18, what is the ft exerted by the w: the mass?
al) 7
F Th
"J
Tz ang > (Waser |
bY cdipeetian = aesay fran prndl
Fr Bae irg -[ece P|
Cc Letn
9 ng ye Leva
& — a a
& ‘ 1 Le Be
BY | 2 ue
| 2 ial, we
gt Fl Jas | z 4
\ pe SP. AY slayoo
4 + an
MAY 16, 20030 1:44°M JG. FHYETCS NG 3ST? Fo}
5) A very large diameter water tank is filled with water to a depth d = 10 m. The tank has a
hole in the side at a height h = 5 m with diameter d, = 1 cm.
4
4,
‘OS |
a) Whatis water that flows out of the hole in a time 2
b) Ho m the base of the wa’ e streal water from the hole hit the
ground?
9 A KAO sea toed 19
bs) kev git
4 Ys
part = fag Cth) SEAR
> 2\(4-CK)
~\lem |
MAY. 16,2003) 1:44°M JG. FHYETCS NOS617 F. §
6) An ice cube with mass m = 100 g is at a temperature T,,,= 0 °C and held on a cloth in a
person’s hand in a room at 0 °C. The contact area between the surface of the ice cube and
person’s hand is A = 25 cm? The thermal conductivity of the cloth is k = 1 W/m/K and its
thickness is t = 0.1 cm. The person’s temperature is constant at T,,.,.., = 37 °C.
a) How long does it take the ice cube to melt?
Pe EEG) ee PIE say
C {o7
reqenre Pt = M3BORTAL = lO! Gre) + 82 kT
3 as
t: 38 Tero s |
ae
MAY. 16. 2003 0 1:45°M JG. THYELSS NOS61? oF?
7) One mole of an ideal gas at a pressure P = 2 atmospheres and temperature T = 100K is
compressed from its initial volume, to one-third of that volume, at constant pressure.
P {ea—e'
v
a) What is the new temperature of the gas?
at is the work done e gas ing the co sion?
c) What is the heat energy input during the compression?
is the change in entro the gas?
U
J Be PB yee. REE]
Ss) we Pay = POCYMA-v): _ PUA
~ V at =
f. -n8t_ (Gro |
rac, ST
ad) dA @- aa, aT
AS. {ae . nope. n oy & Ar)
J
7 2 (-23 J”
