Complete Question
While john is traveling along a straight in interstate highway, he notices that the mile marker reads 242 km. John travels until he reaches the 147 km marker and then retraces his path to the 161 km marker. What is John's resultant displacement from the 242 km marker? How far has he traveled answer in units of km
Answer:
The resultant displacement 
The total distance traveled by john is
Explanation:
From the question we are told that
The first position of john from the finish point is 
The second position of john from the finish point is 
The third position of john from the finish point is 
Generally the displacement from the 242 km marker is mathematically represented as

Here we used
instead of
because
is further than
from the finish point
=> 
Generally the total distance traveled by John is mathematically evaluated as
=>
=>
Work=mass×gravity due to acceleration ×height
Work=100×9.8×5
Work=4900J
Answer:
20 A
Explanation:
Given
Spring pulled from position
x = 5A
we need to calculate total distance of one full cycle of spring motion
if you see image below, you understand easily
When cycle complete
Its total distance become 20 A
<span>work = 500*3 = 1500 J
1500J in 5 sec = 300 watts
Hope that helps:)</span>
B, gossiping is unproessional