SATHEE: Kinematics Question 449

Kinematics Question 449

Question: A metal sphere it’s hung by a string fixed to a wall. The sphere it’s pushed away from the wall by a stick. The forces acting on the sphere are shown in the second diagram. Which of the following statements it’s wrong?

Options:

A) $P = W \tan θ$

B) $\vec{T} + \vec{P} + \vec{W} = 0$

C) $T^{2} = P^{2} + W^{2}$

D) $T = P + W$

Show Answer

Answer:

Correct Answer: C

Solution:

[c] As the metal sphere it’s in equilibrium under the effect of the three forces therefore

$\vec{T} + \vec{P} + \vec{W} = 0$

$T \cos θ = W$ …(i)

$T \sin θ = P$ …(ii)

From equation (i) and (ii) we get

$P = W \tan θ$ and $T^{2} = P^{2} + W^{2}$

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Kinematics Question 449

Question: A metal sphere it’s hung by a string fixed to a wall. The sphere it’s pushed away from the wall by a stick. The forces acting on the sphere are shown in the second diagram. Which of the following statements it’s wrong?

Options:

Answer:

Solution:

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