Physics HW, Help Please
posted by Michael .
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. He catches the 0.430 kg ball precisely at the peak of his jump, when he is 19.2 inches off the ground. He hits the ground 1.61 inches away from where he leapt. If the ball was moving horizontally when it was caught, how fast was the ball travelling?

Physics HW, Help Please 
drwls
Compute the time it takes the player to hit the ground after catching the ball. Call it t.
t = sqrt(2H/g) = 0.315 seconds
The horizontal velocity acquired after catching the ball is 1.61/t inches per second or 0.1342/t ft/s = 0.426 ft/s. Call that Vx.
Use conservation of horizontal momentum for the velocity v of the ball when caught.
v*0.43kg = (70.43 kg)*Vx
Respond to this Question
Similar Questions

Physics
Tom Brady passes a football – at a velocity of 50 ft/s at an angle of 40 degrees to the horizontal – toward an intended receiver 30 yd straight downfield. The pass is released 5 ft above the ground. Assume that the receiver is … 
Physics
Tom Brady (the Patriots’ quarterback) throws a football – at a speed of 30 mph at an angle of 50 degrees to the horizontal – toward an intended receiver 20 yd straight downfield behind the goalline. The pass is released 7.5 … 
Physics
A football player throws a ball with a horizontal distance of 31.0 m so that the other player catches it at the exact height it was initially thrown. If the ball rises and falls by 1.8 m in its trajectory, what is the initial velocity … 
physics
A 80kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. He catches the .43kg ball at the peak of his jump, when he is 17.2 inches off the ground. He hits the ground 1.61 inches away from … 
Physics
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. He catches the 0.430 kg ball precisely at the peak of his jump, when he is 19.2 inches off the ground. He hits the ground 1.61 … 
physics
A basketball of mass 0.602 kg is passed to a player of mass 83.0 kg who jumps off the floor while catching the ball. The player's center of mass is instantaneously at rest just before he catches the ball, which is initially moving … 
physics
A football is thrown from the edge of a cliff from a height of 22 m at a velocity of 18 m/s [39degrees above the horizontal]. A player at the bottom of the cliff is 12 m away from the base of the cliff and runs at a maximum speed of … 
Physics
At bat a baseball player hits a ball at a height of .889 m. The ball leaves the bat at 51 m/s at an angle of 81 degrees from the vertical. The ball skims the top of a 2.74 m wall as it leaves the field. a.) Draw position, velocity … 
psychics
you throw a ball straight upward into the air with a velocity of 20.0 m/s, and you catch the ball some time later. a) how long is the ball in the air b)how high does the ball go c) what is the balls velocity when you catch it I don't … 
physics
quarterback throws a pass to a receiver, who catches it at the same height as the pass us thrown, The initial velocity of the ball is 15.0 m/s, at an angle of 25.0 degrees above the horizontal. How long is the ball in the air?