# physcis

posted by .

After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 35.5 m horizontally from the end of the ramp. His velocity, just before landing, is 18.5 m/s and points in a direction 43.2 ° below the horizontal. Neglecting air resistance and any lift that he experiences while airborne, find (a) the magnitude and (b) the direction of his initial velocity when he left the end of the ramp.

• physcis -

A = 360 - 43.2 = 316.8 Deg,CCW.

Vf = 18.5m/s @ 316.8 Deg.
Xf = Xo = 18.5*cos316.8 = 13.49 m/s.
Yf = 18.5*sin316.8 = -12.66 m/s.

Xo * Tf = 35.5 m.
13.49*Tf = 35.5,
Tf = 35.5 / 13.49 = 2.63 s. = Fall time.

Yo + g*Tf = Yf = -12.66 m/s,
Yo + 9.8*2.63 = -12.66,
Yo + 25.8 = -12.66
Yo = -12.66 - 25.8 = -38.5 m/s.

a. Mag. = sqrt((13.49^2+(-38.5)^2 =
40.8 m/s.

b. tanB = Yo/Xo = -38.5 / 13.49 = -2.8510,
B=-70.67 South of East=289.3 Deg,CCW.

## Similar Questions

1. ### physics

After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 44.5 m horizontally from the end of the ramp. His velocity, just before landing, is 15.4 m/s and points in a direction 35.1 ° below the …
2. ### physics

A Nordic jumper goes off a ski jump at an angle of 10.0° below the horizontal, traveling 92.0 m horizontally and 47.0 m vertically before landing.; (a) Ignoring friction and aerodynamic effects, calculate the speed needed by the skier …
3. ### Physics

A Nordic jumper goes off a ski jump at an angle of 10.0° below the horizontal, traveling 109.0 m horizontally and 44.0 m vertically before landing. (a) Ignoring friction and aerodynamic effects, calculate the speed needed by the skier …
4. ### physics

After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 62.3 m horizontally from the end of the ramp. His velocity, just before landing, is 22.0 m/s and points in a direction 40.3 ° below the …
5. ### physics

A)Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 53.0 m horizontally from the edge of the ramp. His velocity …
6. ### physics

A)Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 53.0 m horizontally from the edge of the ramp. His velocity …
7. ### physics

A)Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 53.0 m horizontally from the edge of the ramp. His velocity …
8. ### Physics

Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 62.2 m horizontally from the edge of the ramp. His velocity …
9. ### Physics

PHYS1111_HMWK02_Vectors_and_2DKinematics » Eddie the Eagle Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced …
10. ### Physics

A skier leaves the ramp of a ski jump with a velocity of 12.6m/s, 14.5° above the horizontal. The slope below is inclined downwards at 52.2°, and air resistance is negligible. a)Calculate the distance from the ramp to where the jumper …

More Similar Questions