Concept explainers
(a)
To Draw: The free body diagram.
(a)
Explanation of Solution
Introduction:
Basically, there are three equilibrium conditions horizontal force equilibrium, vertical equilibrium and moment equilibrium condition.
There must be a downward force exerted by the slot at its left edge, exerting no torque, but balancing the vertical forces.
Conclusion:
Figure represents the free body diagram of a particular support reaction.
(b)
To Find: The magnitude of forces.
(b)
Answer to Problem 61GP
The magnitude of the right force is
Explanation of Solution
Given:
Mass is
Formula used:
For right force apply torque formula, for left force apply equilibrium condition for vertical direction and for self-weight use the following formulas,
Write the expression for Force equilibrium.
Here,
Calculation:
Write the expression for torque equilibrium.
Write the expression for the force equilibrium.
Write the expression for self-weight.
Conclusion:
Thus,the magnitude of theright force is
(c)
To Find:The torque exerted by the support.
(c)
Answer to Problem 61GP
The torque exerted by the support about the left end of the shelf is
Explanation of Solution
Given:
Distance,
Force at right shelf,
Formula used:
Applying the torque to the left end of the shelf, following formula is used
Here,
Calculation:
Substitute the given values in the above equation, the torque is
Conclusion:
Thus, the torque exerted by the support about the left end of the shelf is
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Physics: Principles with Applications
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