Question

7. A ball is thrown vertically upward with a speed of 7.1 m/s. Find:

(9 points)

a. Maximum height reached the ball

b. Its time of flight

C. Velocity the ball would return to its starting point

Answer 1

Given:

$v_0=7.1\:\rm m/s$

$g=9.8\:\rm m/s^2$

(a)

$$h_{\max}=\frac{v_0^2}{2g}=\frac{7.1^2}{2*9.8}=2.6\:\rm m$$

(b)

$$t=2*\frac{v_0}{g}=2*\frac{7.1}{9.8}=1.4\:\rm s$$

(c)

$$v_f=v_0=7.1\:\rm m/s$$