Mary is about to receive the shuttlecock delivered by Jenny in a badminton play as shown in Figure 3.2. If Mary is to return the shuttlecock at the height of 1.72 m at an angle of 62.0° above horizontal, ignore the air resistance, calculate (b) 1.72 m Mary Jenny Figure 3.2 the initial speed of the shuttlecock when it leaves Mary's racket if i takes 1.97 s to land, (i) (ii) the position of Mary in front of the net if the shuttlecock lands on th last line in Jenny's court if the whole length of the badminton court 13.4 m, and (iii) the final speed of the shuttlecock just before it hits the ground.

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!