The graph below shows the position of a toy over time, measured using photogates.

at which of the labeled points is the car's velocity at a single moment lowest?

a. point a
b. point b
c. point c.
d. point d.

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.

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

If forces acting on an object are unbalanced. true or false