JAMB - Physics (2007 - No. 3)
A car of mass 1500 kg goes round a circular curve of radius 50m at a speed of 40 ms-1. The magnitude of the centripetal force on the car is ?
4.8 x 104 N
4.8 x 103 N
1.2 x 103 N
1.2 x 102 N
คำอธิบาย
Centipetal force of the car = ma = (MV)2/r
= (1500 x 40 x40)/50
= 48000 = 4.8 x 104 N
= (1500 x 40 x40)/50
= 48000 = 4.8 x 104 N