Consider the motion of a bullet that is fired from a rifle 2 m above the ground in a northeast direction. The initial velocity of the bullet is (200,200,00. Assume the xaxis points east, the y-axis points north, the positive z-axis is vertical (opposite go, the ground is horizontal, and only the gravitational force acts on the object. a. Find the velocity and position vectors for t20.
b. Make a sketch of the trajectory.
c. Determine the time of fight and range of the bullet.
d. Determine the maximum height of the bullet.

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light