Not to good with math im a language and history kinda guy sorry
Answer:
Before:
After:
Explanation:
<u>Conservation of Momentum</u>
Two objects of masses m1 and m2 moving at speeds v1o and v2o respectively have a total momentum of
After the collision, they have speeds of v1f and v2f and the total momentum is
Impulse J is defined as
Where F is the average impact force and t is the time it lasted
Also, the impulse is equal to the change of momentum
As the total momentum is conserved:
We can compute the speed of the second object by solving the above equation for v2f
The given data is
a) The impulse will be computed at the very end of the answer
b) Before the collision
c) After collision
Compute the car's speed:
And the car's momentum is
The Impulse J of the system is zero because the total momentum is conserved, i.e. \Delta p=0.
We can compute the impulse for each object
The force can be computed as
The force on the car has the same magnitude and opposite sign
Answer: Within any frame of reference that is accelerating
Special relativity was proposed on 1905 by Einstein, who developed his theory based on the following two postulates:
1. <em>The laws of physics are the same in all inertial systems. There is no preferential system.
</em>
2. <em>The speed of light in vacuum has the same value for all inertial systems.
</em>
Focusing on the first postulate, it can be affirmed that <u>any measurement on a body is made with reference to the system in which it is being measured</u>.
Now, taking into account that an inertial reference system is the one that complies with the principle of inertia:
<em>"For a body to have acceleration, an external force must act on it."</em>
The correct answer is
Within any frame of reference that is accelerating
Answer:
b. 5.0 m
Explanation:
Power: Power can be defined as the rate at which work is done.
The S.I unit of power is watt (W).
P = W/t ............................................... Equation 1
Where p = power, W = work, t = time.
But
W = F×d..................................... Equation 2
Where F = force, d = maximum distance.
Substituting equation 2 into equation 1
P = F×d/t
making d the subject of the equation above,
d = Pt/F......................................................... Equation 3
<em>Given: F = 90 Newton, P = 60 watt, t = 7.5 seconds.</em>
<em>Substituting these values into equation 3,</em>
<em>d = 60×7.5/90</em>
<em>d = 5 m</em>
Thus the maximum distance is = 5 m
The right option is b. 5.0 m
Normal is the other half of an action-reaction pair
If a person is sitting on a chair , there must be a gravitation force acting in downward direction which is equal to the weight of that person . That means the person is exerting a force on the chair equal to its weight . But the person is not falling down the chair , because of newtons third law of motion .
There must be a counter force which is equal and opposite to the force exerted by the person on the chair , in order to make net force equal to zero and to make that man in stationary state ( no movement ) .That force is called Normal force which is been acted by the chair on the person .This implies Normal is the other half of an action-reaction pair
learn more about Force:
brainly.com/question/14110395?referrer=searchResults
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