A block of mass 5 kg resting on a horizontal surface is connected by a cord, passing over a light frictionless pulley to a hanging block of mass 5 kg. The coefficient of kinetic friction between the block and the surface is 0.5. Tension in the cord is: (g = 9.8 m/sec2)

Question

A block of mass 5 kg resting on a horizontal surface is connected by a cord, passing over a light frictionless pulley to a hanging block of mass 5 kg. The coefficient of kinetic friction between the block and the surface is 0.5. Tension in the cord is: (g = 9.8 m/sec2) (A) 49 N (B) Zero (C) 36.75 N (D) 245 N

Tardigrade Admin · Accepted Answer

For block A, T=μ N=5a N=5g For block B, 5g-T=5a ⇒ T = 36.75N, a = 2.45 m/sec2

Q. A block of mass $5 k g$ resting on a horizontal surface is connected by a cord, passing over a light frictionless pulley to a hanging block of mass $5 k g$ . The coefficient of kinetic friction between the block and the surface is $0.5.$ Tension in the cord is : $(g = 9.8 m / se c^{2})$

$49 N$

Zero

$36.75 N$

$245 N$

For block A,
$T = μ N = 5 a$ $N = 5 g$
For block B,
$5 g - T = 5 a$
$\Rightarrow T = 36.75 N, a = 2.45 m / se c^{2}$

Q. A block of mass 5kg resting on a horizontal surface is connected by a cord, passing over a light frictionless pulley to a hanging block of mass 5kg. The coefficient of kinetic friction between the block and the surface is 0.5. Tension in the cord is : (g=9.8m/sec2)

49N

Zero

36.75N

245N

For block A, T=μN=5a N=5g For block B, 5g−T=5a ⇒T=36.75N,a=2.45m/sec2

Q. A block of mass $5 k g$ resting on a horizontal surface is connected by a cord, passing over a light frictionless pulley to a hanging block of mass $5 k g$ . The coefficient of kinetic friction between the block and the surface is $0.5.$ Tension in the cord is : $(g = 9.8 m / se c^{2})$

$49 N$

$36.75 N$

$245 N$

For block A,
$T = μ N = 5 a$ $N = 5 g$
For block B,
$5 g - T = 5 a$
$\Rightarrow T = 36.75 N, a = 2.45 m / se c^{2}$