...huge test tomorrow".Thanks!? 1) a skier weighing 600 N goes over a frictionless circular hill of radius R = 20 m. assume that the effects of air resistance on the skier are negligible.as she comes up the hill, her speed is 8.0 m/s at point B, at angle (theta)=20 deg.
(a) what is her speed at the hilltop (point A) if she coasts without using her poles?
(b) what minimum speed can she have at B and still coast to the hilltop?
(c) do the answers two these two questions increase, decrease, or remain the same if the skier weighs 700 N?
for this particular problem, could you please explain how to solve this using centripetal force or acceleration and conservation of energy?
2) a 50 g ball is thrown from a window with an initial velocity of 8.0 m/s at an angle of 30 deg above the horizontal. using energy methods, determine
(a) the kinetic energy of the ball at the top of its flight (ans: 1.2 J)
(b) its speed when it is 3.0 m below the window. (ans: 11 m/s)
(c) does the answer to b depend on the mass of the ball (ans: no)
(d) does the answer to b depend on the initial angle (ans: no)
***im trying to solve this question using conservation of energy***
***If anyone can explain how you go about solving problems like this, and how to actually do the problem, that would be greatly appreciated.
*****Thank you so much for your help!!!*****
(a) what is her speed at the hilltop (point A) if she coasts without using her poles?
(b) what minimum speed can she have at B and still coast to the hilltop?
(c) do the answers two these two questions increase, decrease, or remain the same if the skier weighs 700 N?
for this particular problem, could you please explain how to solve this using centripetal force or acceleration and conservation of energy?
2) a 50 g ball is thrown from a window with an initial velocity of 8.0 m/s at an angle of 30 deg above the horizontal. using energy methods, determine
(a) the kinetic energy of the ball at the top of its flight (ans: 1.2 J)
(b) its speed when it is 3.0 m below the window. (ans: 11 m/s)
(c) does the answer to b depend on the mass of the ball (ans: no)
(d) does the answer to b depend on the initial angle (ans: no)
***im trying to solve this question using conservation of energy***
***If anyone can explain how you go about solving problems like this, and how to actually do the problem, that would be greatly appreciated.
*****Thank you so much for your help!!!*****