Answer:
The velocity of the sound waves across the plains of Sneedville is 500 m/s.
Step-by-Step Explanation:
Distance travel by the screech of Sneetches = d = 250 m
Time taken to cove 250 meters = t = 0.50 s
Let the velocity of the sound waves be v, such that:
v = d/t
⇒ v = 250/0.5
⇒ v = 500 m/s
direction of the elevator's acceleration?
A. 0.23 m/s2 up
B. 1.3 m/s2 up
C. 6.5 m/s2 down
D. 11 m/s2 down
The magnitude and direction of the elevator's acceleration would be
Given the Parameters :
The Normalforce can be calculated using the relation :
Substituting the Parameters into the equation :
Scale reading > weight of woman (73 × 9.8)
810 < 715.4 (acceleration will be upward)
Therefore, the acceleration of the elevator would be
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Answer:
b
Explanation:
n = m(g +a)
n= normal force (N)
m=mass (kg)
g=acceleration of gravity
a= acceleration of elevator
rearrange:
a= n/m - g
a= (810 N/73 kg) - 9.8 m/s ^2
a= 1.3 m/s ^2 up
and the acceleration is upwards bc her weight is less than the scale reading