Question

I will surely mark as branliest if u give me the correct answer of these questions. plz tell me fast

Answer 1

Hope it helps :)
Pls mark as brainlyest :)

Answer 2

1 = 864.36j
2=1102.5j
3=0.02 kg
1. body mass 500g ,g= 9.8ms^2(acceleration)
t=6 sec
kinetic energy=1/2mv^2
but this body is falling
so we can take u=0
so ,v=u+at
v=9.8×6
v= 58.8m/s
now ,Ek= 1/2 ×0.5×(58.8)^2
Ek=864.36 joules,

2. w= m×g×h
here , we have ,m=30kg,s=(15×25)
s=375cm=3.75m

w= 30×9.8×3.75
w=1102.5 jouls

3. k=1/2mv^2
100= 1/2 ×m×(100)^2
200÷10000=m
m=0.02kg