Answer:
Step-by-step explanation:
689.50/98.50 = 7 trampolines they sold
Here’s the graph of y=2x+7 where a point on the graph is (-2,3)
Step-by-step explanation:
We have, Sorin hits a cricket ball straight up into the air. After 1.5 s, the ball is falling straight down with a speed of 6.5 m/s.
We want to find the initial vertical velocity of the ball.
The relation between initial speed, final speed, acceleration and time is given by using first equation of kinematics. Let v₀ is the initial speed. So,
![v=v_o +at](https://tex.z-dn.net/?f=v%3Dv_o%20%2Bat)
Here, v = -6.5 m/s, t = 1.5 s and a = -g
![v_o=v-at\\\\v_o=v+gt\\\\v_o=-6.5+9.8\times 1.5\\\\v_o=8.2\ m/s](https://tex.z-dn.net/?f=v_o%3Dv-at%5C%5C%5C%5Cv_o%3Dv%2Bgt%5C%5C%5C%5Cv_o%3D-6.5%2B9.8%5Ctimes%201.5%5C%5C%5C%5Cv_o%3D8.2%5C%20m%2Fs)
So, the initial velocity of the ball is 8.2 m/s and the formula used is (1).