Question
Rajah 4 menunjukkan sebuah lori melanngar sebuah kereta yang berada dalam keadaan pegun. Selepas perlanggaran, lori dan kereta bergerak dalam arah yang sama.
Figure 4 shows a truck colliding with a stationary car. After the collision, the truck and car moved in the same direction.
(c) Hitung halaju, v_2 bagi kereta tersebut selepas perlanggaran.
Calculate the velocity, v_2 of the car after the collision.
Answer
Hi Farhaini,
The question mentions that the car is stationary (initially at rest), which means u_2 = 0
So the solution would be:
1000(5) + 800(0) = 1000(3.5) + 800(v_2)
800v_2 = 1000(5) - 1000(3.5) = 1500
v_2 = 1500 \div 800 = 1.875ms^{-1}
Hope this helps! 
1 Like
Thank you very much 
