Exercise 2: A skier sliding on a track A skier of mass M slides, without friction, on a path (ABC) situated in the vertical plane as shown in the figure below.

The skier leaves without speed from A.

Given: hA=21m, hB=8m, hC=11m and g=10m/s2.

Calculate the speed of the skier at points B, C and I.

At the point C, the skier leaves the track with a velocity vector vC making an angle α=370 and leaves the track to undergo free-fall just before hitting the ground at I.​

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?