Laws Of Motion Question 1
Question 1 - 2024 (01 Feb Shift 1)
Consider a block and trolley system as shown in figure. If the coefficient of kinetic friction between the trolley and the surface is 0.04 , the acceleration of the system in $\mathrm{ms}^{-2}$ is :
(Consider that the string is massless and unstretchable and the pulley is also massless and frictionless):
(1) 3
(2) 4
(3) 2
(4) 1.2
Show Answer
Answer: (3)
Solution:
$\mathrm{f}_{\mathrm{k}}=\mu \mathrm{N}=0.04 \times 20 \mathrm{~g}=8$ Newton
$\mathrm{a}=\frac{60-8}{26}=2 \mathrm{~m} / \mathrm{s}^{2}$
