Recent content by Vii

Homework Statement The 3.91 kg physics book shown is connected by a string to a 519.0 g coffee cup. The book is given a push up the slope and released with a speed of 3.99 m/s. The coefficients of friction are μs = 0.457 and μk = 0.330. What is the acceleration of the book if the slope is...

Oh! Thank you so much!

Sorry. I'm afraid I still don't get it. I'm really horrible at Physics... So, I get the initial conditions (the height and velocity) and substitute it into the equation and solve for t?

Oooh, now why didn't I think of that before? Thank you! But I've arrived at another problem: how to you tackle the height? Do you just use 3.00t^3 to replace d, rearrange and get solve the quadratic equation? i.e. 3.00t^3=v_1t+\frac{1}{2}at^2

Homework Statement The height of a helicopter above the ground is given by h=3.00t^3, where h is in meters and t is in seconds. After 2.00s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground? Homework Equations d=v_1t +...