A canon is fired upwards from ground level and has a total time of flight of 3.47 seconds. What was the initial speed of the canon?

garden hose sprays a burst of water horizontally from 1.6 m above level ground. It hits a fence 2.1 m away, horizontally, at a height 0.93 m above the ground. What was the initial speed of the burst of water?

One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching this first snowball, you throw a second snowball at a low angle and time it to arrive at the same time as the first. Assume both snowballs are thrown with the same initial speed 10.6 m/s. The first snowball is thrown at an angle of 56◦ above the horizontal. At what angle should you throw the second snowball to make it hit the same point as the first? Note the starting and ending heights are the same. The acceleration of gravity is 9.8 m/s 2

Suppose the position vector for a particle is given as a function of time by r(t) = x(t)î + y(t)ĵ, with x(t) = at + b and y(t) = ct2 + d, where a = 1.40 m/s, b = 1.50 m, c = 0.117 m/s2, and d = 1.12 m. %3D (a) Calculate the average velocity during the time interval from t = 2.15 s to t = 4.10 s. v = m/s (b) Determine the velocity at t = 2.15 s. v = m/s Determine the speed at t = 2.15 s. m/s