Class Management Help HW 4 Begin Date: 6/17/2018 12:00:00 AM -- Due Date: 7/17/2
ID: 1865724 • Letter: C
Question
Class Management Help HW 4 Begin Date: 6/17/2018 12:00:00 AM -- Due Date: 7/17/2018 11:59:00 PM End Date: 8/16/2018 11:59:00 PM (25%) Problem 2: A basketball player is running at 4.9 m/s toward the basket when he jumps into the air to dunk the ball. He maintains the same horizontal velocity while in the air. 50% Part (a) What vertical velocity does he need to rise 0.750 m above the floor in m/s? Grade Summary 0% 100% Potential sin cosO cotan0 asinacos0 atanacotan) sinhO cosh0 tan cotanh0 Degrees O Radians tan() ? Submissions Attempts remaining: 10 (5% per attempt) detailed view 0 Submit Hint I give up! Hints: 3% deduction per hint. Hints remaining: 2 Feedback: 3% deduction per feedback. ? 50% Part (b) At what horizontal distance from the basket, in meters, must he start his jump to reach his maximum height at the same time as he reaches the basket in m?Explanation / Answer
a )
using the kinematic realtion
V2 = Vy2 - 2 g h
02 = Vy2 - 2 X 9.8 X 0.75
Vy2 = 2 X 9.8 X 0.75
Vy = 3.834 m/s
b )
we have V = Vy - gt
t = Vy - V / g
= 3.834 / 9.8
t = 0.39122 sec
the height = 4.9 X 0.39122
h = 1.917 m from the basket