wolfson_1123
Oct3-04, 08:20 AM
Hello i have been able to do 7 out of 8 question on my linear motion questions, but this last question number 8, is proving difficult. I don't know whether the tutor has made a mistake (as the answers are typed at the bottom) so if you could be of help i would be very glad ty.
I am using s = u.t + 0.5.a.t^2
and v = U + a.t
but neither bring up the correct answers:
8. A pistol pellet is fired vertically upwards and lands back at its firing point
8 seconds later. Neglecting air resistance, and assuming the acceleration due to gravity is g = 9.81 m/s2 downwards ! find its maximum height and initial velocity.
[answers: 78.5 m , 39.2 m/s]
Ty every so much :-)
I am using s = u.t + 0.5.a.t^2
and v = U + a.t
but neither bring up the correct answers:
8. A pistol pellet is fired vertically upwards and lands back at its firing point
8 seconds later. Neglecting air resistance, and assuming the acceleration due to gravity is g = 9.81 m/s2 downwards ! find its maximum height and initial velocity.
[answers: 78.5 m , 39.2 m/s]
Ty every so much :-)