Question 5 of 25 A cordless drill is used to drill a hole in a wooden board. Which of the
following energy conversions begins the process that leads to the turning drill
bit removing the wood?

Aparticle of mass m is projected with an initial velocity v0 in a direction making an angle α with the horizontal level ground as shown in the figure. the motion of the particle occurs under a uniform gravitational field g pointing downward. (a) write down the lagrangian of the system by using the cartesian coordinates (x, y). (b) is there any cyclic coordinate(s). if so, interpret it (them) physically. (c) find the euler-lagrange equations. find at least one constant of motion. (d) solve the differential equation in part (c) and obtain x and y coordinates of the projectile as a function of time. (e) construct the hamiltonian of the system, h, and write down the hamilton’s equations (canonical equations) of motion.

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring

How is the ideal mechanical advantage of a wheel and axle calculated?