Please help me with this and show me the work on how to do it I’m confused please and thank you <3

20 joule is your answer

here

mass m =100kg

distance d=50m

acceleration due to gravity a =10m/s²

work =force×displacement

= ma/d=100×10/50=20joule

50,000 joules

50kJoules

Explanation:

F = m * a

here, m = 100kg. a = 10m/s^2

F = 100 * 10

= 1000 Newtons

Here, d= 50m. F = 1000newtons

W = F * d

= 1000 * 50

= 50,000 joules

= 50 kilo joules

the doppler effect is used by weather forecasters to measure 

moving clouds