A box is held at rest by two ropes that form 30° angles with the vertical. The tension T in either rope is 42 N. What is the wei
ght (w) of the box?
36 N
79 N
86 N
73 N
62 N
36 N
79 N
86 N
73 N
62 N
1 answer:
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Answer: Height of building = 17.69m, velocity of brick = 18.6m/s
Explanation: From the question, the body has a zero initial speed, thus initial velocity (u) all through the motion is zero.
By ignoring air resistance makes it a free fall motion thus making it to accelerate constantly with a value of .
Time taken to fall = 1.90s
a)
thus the height of the building is calculated using the formulae below
but u = 0 , hence
b)
to get the value of velocity (v) as the brick hits the ground, we use the formulae below
but u= 0, hence
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Answer:
1) Weight on Mercury
Explanation:
do the same to the rest and use your calculator to find the weight in N.