①把橡皮泥粘在滑塊上先用彈簧測力計(jì)測出;
②再將粘有橡皮泥的滑塊放到木板上,并通過細(xì)線和彈簧測力計(jì)相連。用手向右拉動木板,待彈簧測力計(jì)示數(shù)穩(wěn)定后讀出示數(shù)f滑動摩擦力大小等于;
③多次改變,并重復(fù)步驟①②,實(shí)驗(yàn)數(shù)據(jù)記錄如表所示。
實(shí)驗(yàn)次數(shù) |
1 |
2 |
3 |
4 |
5 |
6 |
壓力F/N |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
彈簧測力計(jì)示數(shù)f/N |
0.2 |
0.4 |
0.6 |
0.8 |
1.0 |
1.2 |