Recent content by mattwild

Because it asks how quickly does the cannonball's shadow move along the ground so I am assuming that means acceleration? Because its velocity is constantly changing so it can't be that

Homework Statement A cannon has a launch speed of 500m/s and is aimed at a target 2.8km away. a. Write an equation for the maximum horizontal range of the cannon as a function of the launch angle theta. b. At what angle must the cannon be launched in order to hit the target? c. As viewed...

W = Fd so F= W/d E =Fe/q so E=W/dq E= 2.4x10^-19 J/(0.03m)(1.6x10^-19) E= 50 N/C F=qE F=1.6x10^-19 x 50 F = 8 x 10 ^ -18 F = ma a = F/m a= 8x10^-18/9.11x10^-31 a= 8.7819x10^12 m/s^2

For b. I get the answer 8.7278 x 10^12 m/s2 after doing F=qE, and the F=ma using the electron mass and found force. Does that make sense?

Ahhh that was the missing key. THANKS!

Homework Statement Two oppositely-charged parallel plates are separated by a distance of 0.03m. a. What is the strength of the electric field between the two plates if it takes 2.4x10^-19 J of energy to move an electron from one plate to the other. b. What is the acceleration of that...

AP Physics HW Help -- Motion of 2 Pendulums Homework Statement A system consists of two metal balls hanging by strings of length L fixed at a common point as shown. Pendulum A has a mass of 2kg and Pendulum B has a period of 2.0s. a. What is the length L of each pendulum? b. What is the...