Question

Homework help plz it would help a lot ​

Answer 1

#82

here we know that

acceleration = 2 m/s/s

time = 5 s

initial speed = 4 m/s

now we can use kinematics to find the final speed

`v_f = v_i + at`

`v_f = 4 + 2(5)`

`v_f = 14 m/s`

So correct answer will be option D)

#83

here we know that

acceleration = 3 m/s/s

time = 4 s

initial speed = 5 m/s

now we can use kinematics to find the final speed

`v_f = v_i + at`

`v_f = 5 + 3(4)`

`v_f = 17 m/s`

So correct answer will be option C)

#84

here we know that

acceleration = 7 m/s/s

time = 3 s

initial speed = 8 m/s

now we can use kinematics to find the final speed

`v_f = v_i + at`

`v_f = 8 + 7(3)`

`v_f = 29 m/s`

So correct answer will be option C)