Energy is the ability to do work
Answer:
91936J
Explanation:
We know that kinetic energy= 1/2 mv^2
M= mass = 68 Kg
v= velocity= 52 m/s
KE=1/2 × 68 × (52)^2
KE= 1/2 × 68 × 2704
KE= 91936J
<span>P waves
P-waves are sometimes called pressure waves, and sometimes they are called longitudinal waves. P-waves are transmitted through the Earth’s interior with a backwards and forwards motion along the line of travel, by alternating compression and dilatation. A jack hammer creates P-waves. They are capable of passing through any type of material they encounter, including the liquid of the Earth’s outer core, although they
will be bent and deflected when they pass across the boundaries separating
layers of different densities.
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F = m . g = 76.5 x 9..8 = 749.7
Net Force = 3225 - 749.7 = 2475.3
F = m.a
2475.3 = 76.5 a
a = 32.35
V = at + v1
V = at + 0
V = 32.35 x 0.15
V = 4.8525
Hope this helps