<span>A large body of air hats has similar properties of a temperature and moisture is an air mass.</span>
Work Done = Force * Distance
This means the least work is exerted by the most distance, so the longer ones are less likely to break.
The shortest one will be the one that breaks easiest.
Answer:
Correct answer: V = 18.43 m/s
Explanation:
Let be initial velocity (speed) V₀ and the current speed at some point V
At start, the box had kinetic energy which is equal to the total energy.
Ek₁ = E = m v₀²/2 = 40 · 20²/2 = 8,000 J
At the ramp point 3m high the box had potential energy:
Ep = m · g · h = 40 · 10 · 3 = 1,200 J we took that g= 10 m/s²
The total energy at any time is equal :
E = Ek + Ep ⇒ Ek = E - Ep = 8,000 - 1,200 = 6,800 J
Ek = m V²/2 ⇒ V = √2 · Ek/m = √ 2 · 6,800/40 = √340 = 18.43 m/s
V = 18.43 m/s
God is with you!!!