Ahiker treks 30 degrees south of east at a speed of 15 m/s for 30 min and then turns due west and hikes at a speed of 8m/s for another 20 min. what is the displacement of this explorer (magnitude and direction)?

19.3 km, south of east

Explanation:

Given

Hiker treks south of east at a speed of 15 m/s for 30 min and then turns due to west and hikes at speed of 8 m/s for another 20 min

Let position vector of Hiker at the end of 30 min

after he turns west so new position vector of hiker is

Therefore Displacement is given by |r'|

for direction

south of east

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

c) power lifting, will be your answer.

,

deku ❤