Physics · Mechanics
A block of mass m is placed on a rough horizontal surface with a coefficient of kinetic friction μ. A force is applied at an angle θ relative to the horizontal. Under what condition will the magnitude of the required pulling force equal the required pushing force to keep the block moving at a constant speed, and what is this value?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The forces will be equal when the angle of application θ = 0°, with a value of μmg.✓
- 2The forces will be equal when the angle of application θ = 45°, with a value of μmg/2.
- 3The forces will be equal when the angle of application θ = 90°, with a value of 2μmg.
- 4The pulling and pushing forces can never be equal for any angle.
Correct answer
The forces will be equal when the angle of application θ = 0°, with a value of μmg.
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