Answer:
11.4 m/s
Explanation:
The expression for the Centripetal acceleration is :
![a=\frac{v^2}{R}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7Bv%5E2%7D%7BR%7D)
Where, a is the accleration
v is the velocity around circumference of circle
R is radius of circle
In the given question,
a = g = Acceleration due to gravity as the car is at top = ![9.81\ m/s^2](https://tex.z-dn.net/?f=9.81%5C%20m%2Fs%5E2)
v = ?
R = 13.2 m
So,
![9.81=\frac{v^2}{13.2}](https://tex.z-dn.net/?f=9.81%3D%5Cfrac%7Bv%5E2%7D%7B13.2%7D)
![v^2=9.81\times {13.2}](https://tex.z-dn.net/?f=v%5E2%3D9.81%5Ctimes%20%7B13.2%7D)
<u>v = 11.4 m/s</u>
The answers is
D. The acid creates cracks in the rocks, which
allow air to circulate through the rock,
causing it to weather
Answer:
Gravitational force is <u>noncontact</u> force
Explanation:
Contact force occurs due to the contact between two different objects. Non-contact force occurs due to either attraction or repulsion between two objects such that there is no contact between these objects. There is no field linked with the contact force. ... Gravitational force is an example of a non-contact force.