¥HÁ¾ ± 發問時間： 社會與文化語言 · 1 0 年前

# 大一物理 有關instantaneous velocity

Two cars, P and Q, travel in the same direction on a long, straight section f a

highway. Car P passes car Q, and is adjacent to car Q at time t0

a.Suppose that car P and car Q each move with constant speed. At time t0, is

the magnitude of the instantaneous velocity of car P greater than, less than, or

equal to the magnitude of the instantaneous velocity of car Q? Explain

b.Suppose instead that car P is moving with constant speed and car Q is

speeding up. At time t0, is the magnitude of the instantaneous velocity of car P

greater than, less than, or equal to the magnitude of the instantaneous velocity

of car Q? Explain

### 1 個解答

• 老古
Lv 7
1 0 年前
最佳解答

a. Car P pass Car Q, : the instantaneous velocity ( it is constant in this case) of car P has to be greater than the magnitude of the instantaneous velocity of car Q.

b. The answer is still same as (a). The instantaneous velocity of car P has to be greater than the magnitude of the instantaneous velocity of car Q at t0 otherwise the car P can not pass the car Q. However, given car Q is speeding up, car Q eventually will pass car P some time later.