大家好,我是Yogi老師,今天我要解答的是在WEBASSIGN上的 AP PHYSICS C HW16 #7,這題作業的主要是要問大家一個觀念就是 F=ma

The figure below gives, as a function of time t, the force component Fx that acts on a 4.25 kg ice block that can move only along the x axis. At t = 0, the block is moving in the positive direction of the axis, with a speed of 3.4 m/s.

(a) What is its speed at t = 11 s?
m/s

(b) What is its direction of travel at t = 11 s?