Posted by **rex** on Saturday, August 2, 2014 at 11:49pm.

why is the following situation impossible? a normally proportioned adult walk briskly along a straight line in the +x direction, standing straight up and holding his right arm vertical and next to his body so that the arm does not swing. his right hand holds a ball at his side a distance h above the floor. when the ball passes above a point marked as x=0 on the horizontal floor, he opens his fingers to release the ball from rest relative to his hand. the ball strikes the ground for the first time at position x= 7.00 h.

- physics -
**bobpursley**, Sunday, August 3, 2014 at 11:08am
yes, possible, given he and the ball had in initial velocity.

Time it takes to fall h meters:

h=1/2 g t^2

t=sqrt (2h/g)

velocity intial= distance/time= 7h/sqrt(2h/g)=

velocity initial= 1/sqrt(2/hg)

so if h initial= 1meter, then velocity

is 7/sqrt(1/4.9)= 7sqrt(4.9)= about 15m/s which is a really brisk walk. I cant run half that fast.

## Answer this Question

## Related Questions

- physics - Why is this following situation impossible? A normally proportioned ...
- physics - An adult person is holding their arm straight out to their side. Their...
- Physics - Standing Waves - a) A plot of lnv vs. lnT should be a straight line. ...
- Physics help - Orville walks 270 m due east. He then continues walking along a ...
- PHYSICS! - Orville walks 270 m due east. He then continues walking along a ...
- Physics - Suppose you walk 18.0m straight west and then 25.0 m straight north. ...
- physics - Compute your average velocity in the following two cases: (a) You walk...
- Physics - A person’s arm is held with the upper arm vertical, the lower arm and ...
- Physics - You are holding a 5 kg dumbbell straight out at arm's length. Assuming...
- Physics - A crane is holding a bloc of metal of 10 000kg. If the crane's arm ...

More Related Questions