In a downhill ski race surprisingly little advantage is gained by getting a running start. This is because the initial kinetic energy is small compared with the gain in gravitational potential energy even on small hills. To demonstrate this, find the final speed and the time taken for a skier who skies 65.0 m along a 35° slope neglecting friction for the following two cases. (Note that this time difference can be very significant in competitive events so it is still worthwhile to get a running start.)(a) starting from restfinal speed m/stime taken s(b) starting with an initial speed of 2.00 m/sfinal speed m/stime taken s

A 58 kg skier is coasting up the hill shown below with speed vi = 10 m/s. ΚΕ Number m/s. Figure 7.37 The skier's initial kinetic energy is partially used in coasting to the top of a rise. What is the final speed on top of the rise assuming that there is no friction acting? 35° m. V = ? Instead, assume that friction acts only on the straight line part of the rise and that the coefficient of friction is 0.24. 2.5 m What is the length of the straight line part of the rise? Number N. What is the normal force acting on skier during the straight line part of the rise? Number m/s. What is the final speed on top of the rise assuming that friction acts only during the straight line part? Number

In a downhill ski race surprisingly little advantage is gained by getting a running start. This is because the initial kinetic energy is small compared with the gain in gravitational potential energy even on small hills. To demonstrate this, find the final speed and the time taken for a skier who skies 60.0 m along a 25° slope neglecting friction for the following two cases. (Note that this time difference can be very significant in competitive events so it is still worthwhile to get a running start.) (a) starting from rest_____ final speed m/s_____ time taken s(b) starting with an initial speed of 2.50 m/s_____ final speed m/s_____ time taken s

In a downhill ski race, little advantage is gained by getting a "running" start. This is because the initial kinetic energy is small compared with the gain in gravitational potential energy on even small hills. To demonstrate this, find the final speed of and the time taken for a skier who skis 70 m along a 30° slope neglecting friction:   (a) starting from rest v = __ m/s t= __ s   (b) starting with an initial speed of 2.6 m/s, compute the ratio of the gain in |ΔPE| when the skier reaches the bottom of the hill to the initial KE initial. |ΔPE|KEinitial= (c) starting with an initial speed of 2.6 m/s v= __ m/s t= __ s