400 mm 300 mm 300 mm

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A kicking-simulation attachment goes on the front of a wheelchair, allowing athletes with mobility impairments to play soccer. The athletes load up the spring shown through a ratchet mechanism that pulls the 2-kg “foot” back to the position 1. They then release the “foot” to impact the 0.45-kg soccer ball that is rolling towards the “foot” with a speed of 2 m/s at an angle 0= 30°, as shown in the figure. The impact occurs with a coefficient of restitution e= 0.75 when the foot is at position 2, where the springs are unstretched. Knowing that the effective friction coefficient during rolling is μk = 0.1, determine (a) the necessary spring coefficient to make the ball roll 30 m, (b) the direction the ball will travel after it is kicked.

400
mm
300 mm
300 mm
Transcribed Image Text:400 mm 300 mm 300 mm
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