1. The man will be able to move the rock. See diagram.
Moment of Man's force : 400 N * 1.2 meter = 480 N-m
Rock's Weight = 50 Kg * 9.8 m/sec² = 490 Newtons
Moment of Rock's weight : 490 N * 0.80 meters = 392 N-m
<em><u> Moment of Man's Force is MORE : 480 N-m > 392 N-m</u></em><em><u> So man will be able to lift the rock.</u></em>2. Let is look at the diagram - second one.
Let us assume that the fulcrum (Pivot) is placed at X meters from the rock.
So moment of Girl's force about Pivot = 200 N * (2 - X) meters = 400 - 200 X
Moment of Rock's weight = 490 N * X = 490 X
As the Girl is able to lift the rock, 400 - 200 X > 490 X
Hence 400 > 200 X + 490 X
400 > 690 X
X < 400/690 = 0.58 meters
<u>
<em> If the Pivot is placed closer than 0.58 meters or 58 cm to the Rock, then </em></u>
<u>
<em> she can lift the rock.</em></u>
Answer:
A force is a push or pull that acts upon an object as a result of that objects interactions
Explanation:
6,000 Joules. The formula for KE is KE=1/2mv^2. 20^2= 400. 400 x 30=12,000. 12,000/2=6,000. :)
C.) A thunderstorm
That’s the Answer