Work done = force x distance
Work done = 50 x 2
Work done = 100J
More people walk to school or work hope this helps
Answer: 438.3 mph
Explanation:
Let z be the distance from the plane to the station. You should draw a right triangle
for the diagram with z on the hypotenuse, 1 on the vertical side, and x on the horizontal
side. The 1 never changes, but x changes with time.
Find the attached file for the solution.
Answer:
57.17 Hz 114.34 Hz 285 Hz
Explanation:
The distance between the men and 1 speaker = 3.5 m
Distance between the men and second speaker = 10-3.5= 6.5 m
Here at this point there will be no sound so there will be destructive interference
Path difference 
We know that for destructive interference 

here v is the speed of sound in air
So for m =0

for m =1

for m=2
