Answer: 17.5 kN
Explanation:
force downward on student:
mg+142-mv^2/r=0
mg=mv^2/r-142
mv^2/r=mg+142
at bottom, apparent weight
weight=mg+mv^2/r=mg+mg+142
apparent weight= 89(2g)+142
for force at bottom, reverse v^2/r
force=m(g+v^2/r) = 89 ( 9.8 + v^2 / 19 )
F = mg + mv^2 / r
F = mg + mg + 142 = 2mg + 142 = 2 x 89 x 9.8 + 142 = 17.5 kN
Answer:
The solution becomes more acidic.
Explanation:
As the pH of a solution decreases, the concentration of hydrogen ions [H+] increases. Acidic solutions have a higher concentration of hydrogen ions and a lower pH.
I hope this helped. :)
Answer is: True.
Fungi are members of the group of eukaryotic organisms. Fungi, kingdom (biology), are separate from the other eukaryotic kingdoms (animals and plants). <span>Fungi can not </span>photosynthesise, they are heterotrophs (<span>absorbs </span>organic carbon). Fungi are primary decomposers (<span>analyse dead or decaying organisms).</span>
Answer:
3.2N
Explanation:
Given parameters:
Coefficient of kinetic friction = 0.43
Weight of box = 7.4N
Unknown:
Force of kinetic friction = ?
Solution:
The force of kinetic friction is given as:
Force of kinetic friction = UN
U is the coefficient of friction
N is the weight
Force of kinetic friction = 0.43 x 7.4 = 3.2N
Answer:
The acceleration is defined by force divided by the mass of the object. So, When the smaller object is hit by a small force, it can produce equal acceleration which is same as that of the bigger body hit with large force.
Explanation:
Force is defined as the product of the mass of the body its applied to and the acceleration of the body in the direction of the force. So acceleration is force divided by the mass of the body.
Let the mass of the smaller body be m and that of the larger body be M.
The smaller force applied on the smaller body be f and the larger force applied on the larger body be F.
So acceleration of the larger body = F/M.
Acceleration of the smaller body = f/m.
For the accelerations to be same,
F/M = f/m.
Or F/f = M/m.
So when the ratio of the force applied on two bodies is in ratio of their masses, the acceleration becomes equal.
