Question

EXPLAIN WITH STEPS PLZ!


* A boat moves towards the east with velocity of 20 m/s, then it is affected by acceleration towards the west of 4 m/s^2?, so its displacement after 15 s from the moment at which the boat starts to acquire the acceleration equals ........

a 350 m towards the east

b 300 m towards the west

c) 750 m towards the east

d) 150 m towards the west​

Answer 1

• Initial velocity=u=20m/s
• Reta rdation=a=4m/s^2
• Time=t=15s
• Displacement=s

$\\ \sf\longmapsto s=ut+\dfrac{1}{2}at^2$

$\\ \sf\longmapsto s=20(15)+\dfrac{1}{2}(4)(15)^2$

$\\ \sf\longmapsto s=300+2(225)$

$\\ \sf\longmapsto s=300+450$

$\\ \sf\longmapsto s=750m$