Question

disculpen,me pueden ayudar plis ​

Answer 1

1. m=15kg

H=6.5m

V=2m/s

a)EPG= m×g×h

Epg=15×10×6.5=975N

b)Ec=1 × m × v^2

2

Ec=1×15×2^2=0.5 × 15 × 4=30N

2

c)Em=Epg+Ec+Epe

Em=975N+30N+0N =1005N

2.m=550kg

H=25m(A) y 4m(B)

V=30m/s

a)Em(A)=Epg(A)+Ec(A)

=550 × 25 × 10 + 1 × 550×30^2

2

=137 500 +247 500=385 000N

b)Em(B)=Epg(B)+Ec(B)=Em(A)

Em(B) = 385 000N

c)POR LO DE ARRIBA

Em(B)=550×4×10+1×550×v^2=385 000N

2

= 22 000N+275v^2=385 000N

= 80N+v^2=1400N

=v^2=1320

=36.3 redondeando 36m/s