Answer:
B
Explanation:
to see how fast she is going per second, you would have to divide the distance traveled by the seconds it took to travel the distance
Speed of the arrow just before it will hit the ground can be calculated by energy conservation
![\frac{1}{2}mv_i^2 + mgh_i = \frac{1}{2}mv_f^2 + mgh_f](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7Dmv_i%5E2%20%2B%20mgh_i%20%3D%20%5Cfrac%7B1%7D%7B2%7Dmv_f%5E2%20%2B%20mgh_f)
![\frac{1}{2}(50)^2 + 9.8(10) = \frac{1}{2}v_f^2 + 0](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%2850%29%5E2%20%2B%209.8%2810%29%20%3D%20%5Cfrac%7B1%7D%7B2%7Dv_f%5E2%20%2B%200)
by solving above equation
![v_f = 51.9 m/s](https://tex.z-dn.net/?f=v_f%20%3D%2051.9%20m%2Fs)
now this will lodge itself 15 cm into the ground
so after lodging itself to 15 cm the speed of arrow becomes zero
now we will have
![v_f^2 - v_i^2 = 2a d](https://tex.z-dn.net/?f=v_f%5E2%20-%20v_i%5E2%20%3D%202a%20d)
![0 - 51.9^2 = 2(a)(0.15)](https://tex.z-dn.net/?f=0%20-%2051.9%5E2%20%3D%202%28a%29%280.15%29)
![a = -8986.7 m/s^2](https://tex.z-dn.net/?f=a%20%3D%20-8986.7%20m%2Fs%5E2)
Now by Newton's II law net force is given as
![F = ma](https://tex.z-dn.net/?f=F%20%3D%20ma)
![F = 0.050 \times 8986.7](https://tex.z-dn.net/?f=F%20%3D%200.050%20%5Ctimes%208986.7)
![F = 449.3 N](https://tex.z-dn.net/?f=F%20%3D%20449.3%20N)
That makes no sense I can't help sorry
Answer:
An electric generator creates a time-dependent induced voltage.
An electric generator converts mechanical energy into electrical energy.
Explanation:
An electric generator works on the principle of electromagnetic induction. This phenomenon hinges on the fact that moving a conducting wire through a magnetic field produces electricity. Electricity is generated as long as there is relative motion between the conductor and the magnetic field. The emf generated is known as induced emf or induced voltage.
The electric generator converts mechanical energy to electrical energy.
Newton's first law of motion states that an object at rest stays at rest unless acted upon by a force while an object at motion stays in motion unless acted upon by an opposite force. Therefore, the ball in motion will stay at motion considering there is no friction force in the field, answer is A. If the field has friction force against the ball then it will slow down and stop eventually, answer is B.