返回「114 學年度臺灣大學轉學生招生考試」題庫

114 學年度臺灣大學轉學生招生考試|第 52 題

普通物理學(A)

Consider the situation shown in the figure, where a baseball player slides to a stop on level ground. Using energy considerations, calculate the distance the 65.0-kg baseball player slides, given that his initial speed is 6.00 m/s and the force of friction against him is a constant 450 N.
  1. 0.6 m
  2. 1.6 m
  3. 2.6 m
  4. 3.6 m
  5. 4.6 m
提示
動能全被摩擦力做負功消耗。用 ½mv² = F·d 解出滑行距離 d。
正確答案

正解:C

詳解
A. 錯。0.6 m 遠小於正解,數量級不符。
B. 錯。1.6 m 為誘答,未正確代入數值。
C. 對。能量守恆:½mv² = F·d,故 d = mv²/(2F) = 65×6.00²/(2×450) = 2340/900 ≈ 2.6 m。
D. 錯。3.6 m 為誘答。
E. 錯。4.6 m 為誘答。

查看全部題目+答案+詳解所有公開題庫

所有公開題庫(含題目與詳解全文)