8.9. A quarterback throws a pass initially at a height of h= 1.8m above the ground. A wide receiver starting from rest at the location of the quarterback accelerates downfield with a = 4.0 m/s² and catches it t = 3.0s later. Assuming the receiver caught it at ground level, compute the speed and launch angle of the ball as it left the quarterback's hands.

A baseball is thrown from an outfielder to the second baseman on a level field. The ball is in the air for a time At = 3.50 s and travels a horizontal distance of 92.0 m %3D before being caught at the same height it was thrown from. Ignore air resistance. a) What are the x- and y-components of the ball's initial velocity? b) What is the maximum height of the ball? c) When is the ball traveling at an angle of 0 = -26.0°?

For a forensics experiment, a student decides to measure the muzzle velocity of the pellets from his BB gun. She points the gun horizontally. On a vertical wall a distance 47.3 m away from the gun, a target is placed. The shots hit the target a vertical distance 0.10 m below the gun's barrel. What is the initial speed of the pellets? Your Answer: units Answer

Students launch a steel ball horizontally from a tabletop. The initial horizontal speed of the ball is v, the tabletop height above the floor is H.The objective is to get steel ball into the coffee can of height h. Calculate the distance D at which the students need to place the can to make a "bulls-eye". v = 6 m/sH = 7 mh = 0.17 m Use g = 10 m/s2, enter two digits after decimal.

43.0 m above level ground at the bottom 17.5 m/s. The rock leaves his hand at a height of h A person stands at the edge of a cliff and throws a rock horizontally over the edge with a speed of vo of the cliff, as shown in the figure. Note the coordinate system in the figure, where the origin is at the bottom of the cliff, directly below where the rock leaves the hand. х (a) What are the coordinates of the initial position of the rock? (Enter your answers in m.) %3D Уo 3 (b) What are the components of the initial velocity? (Enter your answers in m/s.) m/s Vox m/s Voy %D х (c) Write the equations for the x- and y-components of the velocity of the rock with time. (Use the following as necessary: t. Assume that v, and v, are in m/s and t is in seconds. Do not include units in your answers.) m/s Vx %D m/s V. II

Cedar has been trying to get Liam's attention for weeks.  He decides to make a paper airplane to hit Liam in the back of his head (and grab his attention).  If the paper airplane flies 2.64 m [W 26˚ N] and then is caught by the wind, which causes it to travel 3.21 m [S 12˚ E].  What is the paper airplane's total displacement?   (please hand-write it and make it clear)

In a basketball game, the point guard A intends to throw a pass to the shooting guard B, who is breaking toward the basket at a constant speed of 10 ft/sec. If the shooting guard is to catch the ball at a height of 6.6 ft at C while in full stride to execute a layup, determine the speed vo and launch angle with which the point guard should throw the ball. A Answers: Vo = VO 0 = 0 i i 5.5' 43' 10 ft/sec B ft/sec O 25' 6.6'

The drawing shows an exaggerated view of a rifle that has been 'sighted in' for a 91.4-meter target. If the muzzle speed of the bullet is Vo = 309 m/s, there are the two possible angles 0₁ and 02 between the rifle barrel and the horizontal such that the bullet will hit the target. One of these angles is so large that it is never used in target shooting. Give your answers as (a) the smaller angle and (b) the larger angle. (Hint: The following trigonometric identity may be useful: 2 sine cose = sin 20.) (a) Number (b) Number Units Units 91.4 m O

I am again standing on the sky scraper building of height 45.0 m. I throw a metal ball from the top of the building at an angle of 30.00  above the horizontal surface. The ball lands 75 cm from the base of the building.  (a) What is the time taken by the ball to reach the ground? (b) How high from the ground the ball can reach?

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