A49 kg skier skis directly down a frictionless slope angled at 13° to the horizontal. choose the positive direction of the x axis to be downhill along the slope. a wind force with component fx acts on the skier. what is fx if the magnitude of the skier's velocity is (a) constant, (b) increasing at a rate of 1.2 m/s2, and (c) increasing at a rate of 2.4 m/s2. use g = 9.81 m/s2.

Answer

given,

mass of skier = 49 kg

angle made with horizontal = 13°

now,

a) skies velocity is constant

F x = m g sin θ -ma    

       a = 0

F x = 49 × 9.8 × sin 13°          

F x = 108 N          

b) a = 1.2 m/s²        

F x = m g sin θ -ma        

F x =49 × 9.8 × sin 13° - 40 ×1.2

F x = 60 N                

c) a = 2.4          

F x = m g sin θ -ma            

F x =49 × 9.8 × sin 13° - 40 × 2.4        

F x = 12 N            

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

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