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Pulley Block A of mass 4m is attached by a light string to block B of mass 2m. The string passes over a pulley with negligible friction and of negligible mass. Block A is held a distance h above the ground, as shown. The blocks are released from rest, and block A reaches the ground two seconds later. The value of h is most nearly
a. 13.3 m b. 6.7 m c. 3.3m d. 2 m

Sagot :

rafikiedu08

The value of h is most nearly 6.7 m.  option B is the correct answer

From the question, we have

Body mass m1 = 4 kg

mass of the body on the ground m2 = 2 kg

descent time t = 2s

From Newton's second law,

         T - W₁ = m₁ a

        -T + W₂ = m₂ a

Solving, we get

a = -3.27 m / s²

y = y₀ + v₀ t + ½ a t²

0= y₀ + 0  +½ a t²          

y₀ = ½ 3.27 2²

y₀ = 6.54 m

The value of height is most nearly 6.7 m

Kinematics:

The net force, the mass, and the acceleration of a body are related by Newton's second law.

     ∑ F = m a

Kinematics investigates how objects move while searching for connections between position, speed, and acceleration.

y = v₀ t + ½ a t²

To learn more about Kinematics visit:  brainly.com/question/19818185

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