Answer:
Correct answer: E total = 2,800 J
Explanation:
Given:
m = 4 kg the mass of the object
V = 20 m/s the speed (velocity) of the object
H = 50 m the height of the object above the surface
E total = ? J
The total energy of an object is equal to the sum of potential and kinetic energy
E total = Ep + Ek
Ep = m g H we take g = 10 m/s²
Ep = 4 · 10 · 50 = 2,000 J
Ek = m V² / 2
Ek = 4 · 20² / 2 = 2 · 400 = 800 J
E total = 2,000 + 800 = 2,800 J
E total = 2,800 J
God is with you!!!
The ground exerts an equal force on the golf ball
Answer:
(C) because the elevator is not accelerating
Note F = M a = M g (the resultant force on the elevator is due to gravity)
or Fup = Fc the force exerted on the elevator by the cable
and Fdown = Fe the force exerted on the elevator by gravity
F = M a = Fup - Fdown = zero resultant force on elevator
Answer:
<h2>
<em><u>Joules</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>Watts</u></em><em><u> </u></em><em><u>×</u></em><em><u> </u></em><em><u>Seconds</u></em></h2>
Explanation:
If you multiply the number of watts by the number of seconds, you'll end up with joules.
