Answer:
9.38J
Explanation:
mass = 0.425kg
height (h) = 2.25m
g = 9.81m/s^2
Gravitational potential energy (PE) = mgh
Plug in all info you got:
(0.425kg)(9.81m/s^2)(2.25m) = 9.38J
Propose a unique explanation
I dont know if you mean lead instead of lean .
anyway i think <u>gamma rays</u> will penetrate further
this is because gamma rays are very penetrating , they have a shorter wave lenght than X-rays because the energy which produced them is greater .
Although both are similar but X-rays will become weaker and less penetrating when passing through a block of lead unlike the gamma rays eventhough it might reduse their intensity > but both will never stop ! .
This is a hard question!! 'cause both are similar but as i said i think gamma rays will penetrate further
Explanation:
u= 0 ( because car start rest)
v=400
t=3.5
v-u/t
400-0/3.5
400/3.5
114m/s
f= 12000
f=ma
12000=m*114
m=12000/114
105 kg approx