# Recent content by Frawx

1. ### B Hooke's Law and Restoring/Applied Force

Thanks for all the responses! :) I guess I will sum things up to be sure. For F=kx where F is applied force, When the spring accelerates initially, F>kx (restoring force < applied force) When the spring decelerates finally, F<kx (restoring force > applied force) When the spring is at...
2. ### B Hooke's Law and Restoring/Applied Force

According to Hooke's Law, F=-kx where F is the restoring force, k is the spring constant and x is the length of extension/compression. When an applied force compresses a spring, a restoring force will act in the opposite direction. When a spring is compressed and is in equilibrium (not...
3. ### B The change in magnitude of centripetal acceleration

Thanks for the responses! Turns out that the answer to this question was simpler than I had thought. The formula for centripetal acceleration at an instantaneous point in time is ac=v2/r. The formula for centripetal acceleration for a changing tangential velocity over time is ac=(v(t))2/r.
4. ### B The change in magnitude of centripetal acceleration

What if the instantaneous linear speed is increasing? How would I be able to find out the centripetal acceleration's increase as the instantaneous linear speed increases? The formula only applies to an instantaneous point in time. Additionally, what happens when the object is not moving in a...
5. ### B The change in magnitude of centripetal acceleration

When an object (e.g. racecar) moves around in circles with constant tangential velocity, constant centripetal acceleration is present. What happens to the centripetal acceleration when the racecar is at rest, then increases its speed? I know that the tangential velocity increases due to the...