The world long jump record is 8.95 m (mike powell, usa, 1991). einaaa@berkeley. edu treated as a projectile, what is the maximum range, in meters, obtainable by a person if he or she has a take-off speed of 9.2 m/s? assume the motion is over level ground and the initial velocity makes an angle of 45° with the horizontal.

8.66 m

Explanation:

= initial speed of person = 9.2 m/s

= Angle of launch = 45°

Consider the motion of the person along the vertical direction.

= initial speed of person =

= acceleration due to gravity =

= time of travel

= vertical displacement =

Using the kinematics equation that suits the above list of data, we have

Consider the motion of the person along the horizontal direction.

= speed of person =

= Horizontal distance traveled

= time taken =

Since there is no acceleration along the horizontal direction, we have

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂

the assestment will probley apele with cause and effect