A car accelerates at 3ms-2 along a straight horizontal road. A child of mass 10 kg is setting on a safety seat inside the car. Find the magnitude of the resultant force exerted bt the safety seat on the child.
A. 30 N
B. 100N
C. 104N
D. 130N
Ans. C
Thanks
Ans.C
PHY past paper II 2003 Q8
2007-04-20 7:22 pm
回答 (1)
2007-04-20 7:34 pm
✔ 最佳答案
horizontal force = ma =3*10 = 30vertical force = mg = 10*10 =100
resultant force = sqrt(30^2+100^2) = 104kN
收錄日期: 2021-04-23 16:54:57
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