Answer:31.62 m/s
Explanation:
Given
mass of body
Pull on chain is
Pull get smaller at the rate of
Net Upward Force
net acceleration
but g is acting downward
using
here initial velocity is zero
The velocity of sound on a particular day outside is 331 meters/second. What is the frequency of a tone if it has a wavelength o
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Answer:
41°
Explanation:
Kinetic energy at bottom = potential energy at top
½ mv² = mgh
½ v² = gh
h = v²/(2g)
h = (2.4 m/s)² / (2 × 9.8 m/s²)
h = 0.294 m
The pendulum rises to a height of above the bottom. To determine the angle, we need to use trigonometry (see attached diagram).
L − h = L cos θ
cos θ = (L − h) / L
cos θ = (1.2 − 0.294) / 1.2
θ = 41.0°
Rounded to two significant figures, the pendulum makes a maximum angle of 41° with the vertical.
