a ball thrown horizontally at 14.50 m/s travels a horizontal distance of 43.00 b

Question

a ball thrown horizontally at 14.50 m/s travels a horizontal distance of 43.00 before hitting the ground from what height was the ball thrown So Activity #5 2D Kinematics - 1. Consider a projectile launched at 20.00 m/s at 30.00° above the horizontal. 5 a. What is the x-component of the initial velocity? b. What is the y-component of the initial velocity? c. What is the x-component of the velocity of the projectile at its maximum height? d. What is the y-component of the velocity of the projectile at its maximum height? e. Is the y-component of velocity of the projectile zero just before it hits the ground? 2. A ball thrown horizontally at 14.50 m/s travels a horizontal distance of 43.00 m before hitting the ground. From what height was the ball thrown? a. b. What is the ball's speed just before it hits the ground? 32

Explanation / Answer

2)

given :-

v = 14.50 m/s

d = 43 m

v = d / t

t = d / v = 43 m / 14.50 m/s

t = 2.97 m

Height = 1/2 (t^2 x g)

h = 1/2 (2.97^2 x 9.81)

h = 43.27 m

b)

v^2 = u^2 + 2as

v^2 = 14.5^2 + 2*9.81*43

v = 32.47 m/s
23.46 m/s

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