The record distance in the sport of throwing cowpats is 81.1 m. This record toss was set by Steve Urner of the United States in
1981. Assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) Determine the initial speed of the projectile. m/s
Given there are three blocks of masses , and (ref image in attachment)
When all three masses move together at an acceleration a, the force F is given by
F = ( + + ) *a ................(equation 1)
Also it is given that does not move with respect to , which gives tension T is exerted on pulley by only, Hence tension T is
T = *a ..........(equation 2)
There is also also tension exerted by . There are two components here: horizontal due to acceleration a and vertical component due to gravity g. Thus tension is given by
T = ................(equation 3)
From equation 2 and 3, we get
*a =
Squaring both sides we get
* = * (+)
* = ( * )+ ( *)
( - ) * = *
= */( - )
Taking square root on both sides, we get acceleration a
a = *g/()
Hence substituting the value of a in equation 1, we get
In some fields of physics, they are distinguished by their origin: Gamma rays are created by nuclear decay, while in the case of X-rays, the origin is outside the nucleus.
Periodic table is a table that arranges elements based on physical and chemical properties into groups and periods. Non metals reacts by gaining electrons, the ease of gaining electrons determines the reactivity of a non metal. Argon and helium belong to group eight of the periodic table therefore are unreactive (inert), carbon belongs in group thus reacts by gaining 4 electrons while fluorine is a group 7 element and reacts by gaining 1 electron. Therefore, the answer is fluorine,since it requires to gain only one electron.