Concept explainers
(a)
The minimum force
(a)
Answer to Problem 78GP
The minimum force
Explanation of Solution
Formula used:
Apply the Newton’s second law of motion to determine the minimum force. The formula for force is
Calculation:
The weight leads to gravitational force on the object, the force exerted on the object depends upon the mass of the object and the acceleration due to gravity.
The force leads to push or pull which is a vector, so the friction exerted on other by the object is,
Where,
Apply the Newton’s second law of motion, net force is equal to the product of mass
Substitute the value,
Conclusion:
Therefore, the minimum force
(b)
The tension in each section of rope:
(b)
Answer to Problem 78GP
The tension at each section of rope is
Explanation of Solution
Formula used:
Apply the Newton’s second law of motion to determine the tension on each section of rope. The formula for force is
Calculation:
Consider the pulleys frictionless and mass less. Apply the Newton s second law of motion,
Then,
Where,
The value of
Therefore, the tension at each section of rope is
Chapter 4 Solutions
Physics: Principles with Applications
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