Question

A skier of mass 40 kg, pushes off the top of a hill with an initial speed 4.0 m/s. Neglecting friction, how fast will she be moving after dropping 10 m in elevation?

Answer 1

is there any angle of inclination given???

Answer 2

no

Answer 3

i figure no friction means acceleration due to gravtiy which is almost 10m/s^2. So the skier has probably only been moving for about a second but idk because of the 4m/s

Answer 4

so take it to be 0 degrees from the horizontal

Answer 5

so vertical initial velocity is zero so apply v=u + at

Answer 6

what does the u represent?

Answer 7

initial velocity = 0

Answer 8

also there is no time. are we just assuming t= 1 because she has moved 10 m

Answer 9

oh sorry use v^2 = u^2 + 2ah

Answer 10

so it would be -14m/s correct?

Answer 11

or 14 m/s

Answer 12

yup.... magnitude is 14
the sign just tells u d direction which is ur convention

Answer 13

yes thank you

Answer 14

u r welcum