A ladder, of length 3m and mass 20kg leans against a smooth, vertical wall so that the angle between the horizontal ground and the ladder is 60. a) find the magnitude of the friction and normal reaction forces that act on the ladder, if it is in equilibrium
b) Find the minimum value of the coefficient or friction between the ladder and the ground

Will a heavier bowling ball hit pins better than a lighter bsll

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

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.