Question

FAN AND MEDAL PLEASE HELP
I need help with these two homework question

Answer 1

@katherinkoon

Answer 2

@Imverytired

Answer 3

@rebeccaxhawaii

Answer 4

Is the first one A?

Answer 5

1) velocity is a vector quantity, with a magnitude of 50 m/s and an angle of 75°
so it's initial horizontal velocity is 50cos(75°). assuming negligible air friction or wind there is no horizontal force that will act on the rocket to change this velocity

s(t) = 50tcos(75°)

it's initial vertical velocity will be 50sin(75°) however gravity will be opposing this force accelerating the rocket downwards -9.8 m/s^2

Answer 6

a(t) = -9.8
given v(t) = ∫ a(t) dt
=> v(t) = -9.8t + c where the c is the initial vertical velocity .
=> v(t) = -9.8t + 50sin(75°)

Answer 7

so was I right is 1. A