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Best answer gets 100 points. What is the position at 8 seconds? Please help. Diagram and answers to part 1-3 are down below, need help with part 4, or, question 16. An explanation would be great :-)

Part 1: -4m/s

Part 2: -37.5m

Part 3: -29m/

Best answer gets 100 points. What is the position at 8 seconds? Please help. Diagram and answers to part 1-3 are down below, need help with part 4, or, question class=

Answer :

#1

Velocity at 1s

  • Initial velocity -3m/s

Acceleration -1m/s²

So final velocity=-3-1=-4m/s²

#2

Position at 1s

Displacement -4(1)=-4m

  • Position=-34-4=-38m

#3

Velocity at 8s

  • Initial at 2s =-3-2=-5m/s
  • acceleration=-4m/s²
  • Time=8-2=6s

Final velocity

  • v=u+at
  • v=-5-4(6)
  • v=-5-24
  • v=-29m/s

#4

Position

Displacement till 2s

  • -4(2)=-8m

Displacement from 2 to 8s

  • -29(6)
  • -174m

Final position

  • -34-8-174
  • -38-174
  • -212m

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