Question
A Christmas tree ball will break if dropped on a hardwood floor with a speed of 2.0 m/s or more. If it falls 15 cm from a tree branch to the floor, will it break?
Answers
bobpursley
KE at the floor: 1/2 mv^2
PE at drop = mgh
set them equal
mg(.15)=? 1/2 m (2^2)
.15g =? 2
g=? 2/.15=13
but g is not = or > than 13, so
the ball does notbreak, not enough height.
PE at drop = mgh
set them equal
mg(.15)=? 1/2 m (2^2)
.15g =? 2
g=? 2/.15=13
but g is not = or > than 13, so
the ball does notbreak, not enough height.