15. Friction due to fluids is called O (a) force
O
(b) pressure
O (c) friction
O (d) drag

Explain what makes a passenger in a turning car slide toward the door. critical thinking

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

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.