Need Help!! Will FAN and MEDAL!!!

1)Little Timmy wants to measure how tall his house is. He doesn’t have a tape measure but does have a stopwatch. He recruits Big Bob to climb on his roof and drop a rock. He times the rocks fall and finds it to be 1.36 s. How tall is his house?

Question

Need Help!! Will FAN and MEDAL!!!

1)Little Timmy wants to measure how tall his house is.  He doesn’t have a tape measure but does have a stopwatch.  He recruits Big Bob to climb on his roof and drop a rock.  He times the rocks fall and finds it to be 1.36 s.  How tall is his house?

osprey · Answer

this is the KINEMATIC EQUATIONS again. s = ut + 1/2 a t squared. u is zero "dropped". s= 1/2 x10 x 1.36^2=about 1/2 x 10 x 2 = about 10metres ? If I'm right, that is. http://perendis.webs.com