Kinetic energy = 1/2 mv²
K.E = 1/2 x 15 x 4²
K.E = 120 Joules
Answer:
-4714.28N
Explanation:
Given
- Mass of person, m= 55 kg
- Car speed initially ,u =30
- Car speed finally, v=0(car comes to a halt)
- Duration for the car to come halt,t=0.35 sec
This question is based on the concept of Impulse
Impulse is the force acting in a time interval(usually very short)
it is equal to force multiplied with time and also equal to change in momentum of body
⇒
Therefore the seat belt exerts a force of -4718.28N on the person
The<u> negative sign</u> signifies that seat belt exerts force in opposite direction of Force
Answer:
I need the picture to amswer the question thay's why it says " "
#7
Given that an electron revolves in a circle and the essential centripetal force is given as
now we need to find its speed
so we know that this force is given as
#8
Here the force due to earth on satellite is the centripetal force to revolve around earth
so we can say that force due to earth is given as
we know that
now from above equation we have
The answer is: [D]: "the position of the moon each month in relation to THE SUN AND THE MOON" .
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Note of interest: The origin of the word "month" was: "moon-th" — but shortened to "month" — (no coincidence!).
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