Ball A is thrown in a horizontal x-direction from a certain height. Ball B is dropped at the same time and from the same height. Which of the following statements is true about Balls A and B? (Neglect Air Resistance}

Both balls hit the ground simultaneously

Explanation:

Let´s call b₁  ( the ball dropped ) the equation for a free fall movement is, tacking as the origin of coordinates  the level from which it was dropped

V = g*t  ( since V₀ initial velocity is 0 )

In the case of projectile movement the equation for Vx and Vy (these speeds are independent)

are:

Vx = V₀x      (constant)    and Vy = Voy + g*t  

Vy = V₀ * sin 0⁰ + g*t      Vy = 0 + g*t

As we can see V is the same in both cases then the balls hit the ground simultaneously

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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