Abody is projected from the ground at an angle of 30° with the horizontal at an initial speed of 128 ft/s. ignoring air friction, determine:

a) in how many seconds it will strike the ground.

b) how high it will go.

c) what its range will be.

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

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.

What are the factors that affect the resistance of a wire?