1.For a body dropped from a height, h, the speed, V,with which it strikes the ground depends only on h
and g and a dimensionless numerical factor. Obtain an expression connecting v, h and g.
"a=g"
"v=gt+v_0"
if "v_0=0" :
"v=gt"
"h_t=h-gt^2\/2"
where h is height at t=0,
ht is height at moment t
when body strikes the ground:
"h_t=0"
"t=\\sqrt{\\frac{2h}{g}}"
speed, when body strikes the ground:
"v=g\\sqrt{\\frac{2h}{g}}=\\sqrt{2gh}"
Comments
Leave a comment