If an object is dropped, how fast will it be moving after falling #16 m#?

2 Answers
Jan 12, 2017

Answer:

The velocity is #=17.7ms^-1#

Explanation:

Computing in the vertical direction #darr_+#

#u=0#

#a=g=9.8#

#s=16#

#v^2=u^2+2as#

#v^2=0+2*9.8*16#

#v=sqrt(2*9.8*16)=17.7ms^-1#

Jan 12, 2017

Answer:

#v=(28sqrt10)/5ms^(-1)#

Explanation:

measuring down as positive

Considering vertical motion

initial velocity #u=0 ms^(-1)#

acceleration #g=+9.8ms^(_2)#

displacement #s=16m#

#v^2=u^2+2as#

#v^2=0+2xx9.8xx16#

#v^2=313.6#

#v=sqrt313.6=(28sqrt10)/5ms^(-1)#