Explanation:
Transparent objects do not form shadows. The light passes completely from the transparent objects thus these objects will not form shadow. ... In such objects, the light gets refracted thus, such objects forms shadow. The refraction is also the reason why we can see such objects.
1) Inertia causes the person to keep going when the vehicle stops, so if you're not wearing a seatbelt you'll keep going until you hit something. Whether that be the seat ahead, the windshield, or the road.
2) It takes 4 times as long to stop a vehicle going twice the speed.
3) A large vehicle takes longer to stop because there's more mass and more kinetic energy there.
4) To prepare to enter sharp curves, a driver should slow down before turns
Answer:
144 ft
Explanation:
h(t) = -16t² + 64t + 80
The maximum height is at the vertex. We can find the vertex of a parabola using -b / (2a):
t = -64 / (2×-16)
t = 2
The vertex is at 2 seconds. The height of the stone at this time is:
h(2) = -16(2)² + 64(2) + 80
h(2) = 144
The maximum height is 144 feet.
Answer:
Part a)
Final speed of the corn is 19.05 m/s
Part b)
Kinetic energy of the corn is 3.1 J
Explanation:
Part a)
As we know that the initial position of the corn is
h = 18.5 m
now we also know that it will fall from rest and moving under constant acceleration so we will have
![v_f^2 - v_i^2 = 2 a d](https://tex.z-dn.net/?f=v_f%5E2%20-%20v_i%5E2%20%3D%202%20a%20d)
![v_f^2 - 0 = 2(9.81)(18.5)](https://tex.z-dn.net/?f=v_f%5E2%20-%200%20%3D%202%289.81%29%2818.5%29)
![v_f = 19.05 m/s](https://tex.z-dn.net/?f=v_f%20%3D%2019.05%20m%2Fs)
Part b)
Kinetic energy of the corn is given as
![K = \frac{1}{2}mv^2](https://tex.z-dn.net/?f=K%20%3D%20%5Cfrac%7B1%7D%7B2%7Dmv%5E2)
![K = \frac{1}{2}(0.017)(19.05)^2](https://tex.z-dn.net/?f=K%20%3D%20%5Cfrac%7B1%7D%7B2%7D%280.017%29%2819.05%29%5E2)
![K = 3.1 J](https://tex.z-dn.net/?f=K%20%3D%203.1%20J)