An object that is launched from the top of the tower is dense enough that air resistance can be ignored. The object's initial velocity has components (vx = 30 m/s, vy = 20 m/s). What are the components of the object's velocity 3 seconds after launch?

The components of the object's velocity 3 seconds after launch are

m/s and m/s.

Explanation:

The given components of initial velocity are

m/s,

m/s.

Assuming the y-axis is along the direction of gravitational force, so, the velocity along the x-axis will remain unchanged.

So, the x-componebt of the velocity after 3 seconds, m/s.

Using the equation of motion along the y-direction, the final velocity, v, of a mass after time, t, having initial velocity, u is

v=u+at

In this case, ( as upward direction is taken as positive)

So, at time, t=3s, the final velocity in y-direction is

So, the y-component of the final velocity is 9.43 m/s in the downward direction.

Hence, the components of the object's velocity 3 seconds after launch are

and .

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.