Physics - Vectors and 2D motion

AI Thread Summary
To solve the problem of a Nordic jumper's motion, start by drawing a diagram to visualize the jump's trajectory. The horizontal distance traveled is 108 meters, and the vertical distance is 55 meters, with the jump angle at 10 degrees below the horizontal. Use the equations of motion for both horizontal and vertical components to derive the skier's initial speed. The horizontal motion can be described by the equation \(d = vt\), while the vertical motion involves gravitational acceleration. By solving these equations simultaneously, the required speed of the skier upon leaving the ramp can be calculated.
johnnyies
Messages
93
Reaction score
0

Homework Statement



A Nordic jumper goes off a ski jump at an angle of 10.0 degrees below the horizontal, traveling 108 meters horizontally and 55.0 meters vertically before landing. (a) ignoring friction and aerodynamic effects, calculate the speed needed by the skier on leaving the ramp.

I don't know where to start :(
 
Physics news on Phys.org
start by drawing a diagram. Then can you write the horizontal and vertical equations?
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top