Homework Statement
An outfielder throws a baseball with an initial speed of 79.0 mi/h. Just before an infielder catches the ball at the same level, its speed is 65 ft/s. How much of the ball's mechanical energy is dissipated by air drag? (The weight of a baseball is 9 oz.)
Homework Equations...
I had to look it up, but 6371 km is from the surface of Earth to its centre. So I will try now with the new radius of (6371km+790km) * (10^3m/1km) = 7.16*10^6metres.
ANS: 7460.63 = 7461m/s
Thanks for your help!
Hi Ambushes,
First law in terms of a net force: "if there is no net force acting on a body (Fnet=0), the body's velocity cannot change and the body cannot accelerate"
The loosely tied rope probably snapped before any significant force could be exerted.
A body at rest, stays at rest.
Hope it helps!
Homework Statement
An Earth satellite moves in a circular orbit 790 km above the Earth's surface. The period of the motion is 100.5 min.
(a) What is the speed of the satellite?
(b) What is the magnitude of the centripetal acceleration of the satellite?Homework Equations
a= v2 / r
T = (2 Pi...