10m/s 20 m 10 m R.

A tennis ball is hit by 2024 Australian Open Champion Aryna Sabalenka and after the ball leaves her racket it goes on to hit the very top of the net, which is a vertical height of 95 cm above the surface of the court. The tennis ball leaves Aryna's racket with an initial speed of 40 m/s and an angle of 4° above the horizon. After leaving her racket the tennis ball hits the top of the net 0.35 seconds later.At what height above the ground in meters did Aryna's racket make contact with the ball during the shot? How far from the net in the horizontal direction in meters did Aryna's racket make contact with the ball? When the ball hit the net, was the ball still on it's way to reaching its maximum height above the ground or was it starting to return to the ground after reaching its maximum height? Show or describe how you determined this.

A projectile is launched at 10 m/s over level ground at an angle of 22° to the horizontal. What maximum height does this projectile reach? a) 0.72 m b) 3.51 m 12.5 m d) 1.66 m

AUG-1 An artillery shell is shot with a speed of 300m/s from a mountain top at an angle 0 above the horizontal as shown in the figure to the right. The shell rises to a maximum height 2,000m above its launch point at point 2, then descends to point 3 where it is at its launch height. It continues on to point 4, which is just before it hits the ground where it is 1,500m below its launch point. a) Find the speed of the shell at point 2. b) Find the speed of the shell at point 3. c) Find the speed of the shell at point 4. V₁-300m/s 2,000m 1,500m 0 2 (neglect air resistance, use conservation of mechanical energy) 3