The measurement of sound is in decibels.
Answer:
The standard acceleration due to gravity (or standard acceleration of free fall), sometimes abbreviated as standard gravity, usually denoted by ɡ0 or ɡn, is the nominal gravitational acceleration of an object in a vacuum near the surface of the Earth. It is defined by standard as 9.80665 m/s2 (about 32.17405 ft/s2).
Explanation:
The force applied to the lever is 400 N, because the force applied by the lever (800 N) divided by the mechanical advantage of the lever (4) equals
400 N.
(800/4) = 200
Solution :
Given :
Mass, m = 7.80 kg
Radius, r = 0.280 m
Force, F = 34 N
a). St = I x a



b). The acceleration of the part of the chord is
= 31.13 x 0.280

c). Magnitude of the force is = 
= 83.73 N
d). The direction of force is = arctan (7.8 x 9.81)/34
= 2.25
e). The answers in part (c) and (d) will change when the pull of force is given in the upward direction instead of giving in the horizontal direction