Good Stuff Happens in 1:1 Meetings: Why you need them and how to do them well
Physics 101 learning object 1
1. Lauren
Rappaport
Feb
1,
2015
Learning
Object
1
Question:
A
mass
of
5kg
is
hanging
from
a
massless
string,
moves
in
a
simple
pendulum
motion
with
a
period
of
1
seconds
and
angular
displacement
of
30o.
Assume
gravitational
force
is
9.8m/s2.
a)
Find
the
displacement
of
the
mass.
𝑇 = 2𝜋
𝐿
𝑔
𝐿 = 𝑔(
!
!!
)!
=
0.25m
displacement
=
s
=
Lθ
s
=
(0.25)(30)
=
7.4m
b)
Find
the
acceleration
of
the
mass
𝑎 = −𝑔𝑠𝑖𝑛𝜃
a
=
-‐
(9.8)sin(30)
a
=
9.7m/s2
c)
Find
the
force
of
tension
due
to
the
string
T
=
mgcosθ
T
=
(5)(9.8)cos(30)
T
=
7.6N
