Physics, 15.01.2020 05:31 llama1314

In what ways did balanced and unbalanced forces affect the motion of the gymnast? what forces caused her to rise into the air? what forces are acting on the gymnast in the picture?

In what ways did balanced and unbalanced forces affect the motion of the gymnast? what forces caused

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Answer from: mahadsaeed101

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1. In what ways did balanced and unbalanced forces affect the motion of the gymnast.

The balanced force allowed the gymnast to stay still at the beginning before leaping, while the unbalanced force allowed her to move once she started to leap.

A "balance force" refers to the gravity and the opposing force (reaction force) that acts on an object. This allows the object to stay still, since the reaction force is same size to the weight of the object. Thus, the forces are balanced.

An "unbalanced force" refers to the driving force that is opposed by friction and air resistance force, provided that the driving force is greater than the friction and air resistance force. This allows the object to move or accelerate.

2. What forces caused her to rise into the air?

The forces which caused her to rise are the driving force and air resistance force. The driving force caused the gymnast to move forward or up in the air. This force is opposed by the air resistance force that slows down the gymnast. If the driving force is greater than the air resistance force, the gymnast will move forward or accelerate because the forces are unbalanced.

3. What forces are acting on the gymnast in the picture?

There are primarily 4 forces that are acting on the gymnast: the gravitational force (gravity), reaction force, driving force and air resistance force. The gravity and reaction force are responsible for the balanced forces acting on the gymnast, while the driving force and the air resistance force are responsible for the unbalanced forces acting on the gymnast.

Answer from: Quest

electric

explanation:

Which type of heating system is used to heat many buildings from a central location?

Answer from: Quest

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

$_a^z\textrm{x}\rightarrow _{a-2}^{z-4}+_2^4\alpha$

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

$_a^z\textrm{x}+_{-1}^0\textrm{e}\rightarrow _{z-1}^a\textrm{y}$

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases $\gamma -radiations$ . this process does not change the mass number.

$_a^z\textrm{x}^*\rightarrow _a^z\textrm{x}+_0^0\gamma$

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as $\beta ^+$ -decay. in this the mass number remains same.

$_a^z\textrm{x}\rightarrow _{z-1}^a\textrm{y}+_{+1}^0e$

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

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