Abridge, constructed of 11 beams of equal length and negligible mass, supports an object of mass as shown. real bridges of this sort have steel rockers at the ends, these assure that the support forces on the bridge are vertical even when it expands or contracts thermally.

find f_p, the vertical force that pier p exerts on the left end of the bridge.

The vertical force that pier P exerts on the left end of the bridge,

Fp = ²/₃ Mg

The vertical force that pier Q exerts on the right end of the bridge,

Fq = ¹/₃ Mg

Further explanation

Let's recall Moment of Force as follows:

where:

τ = moment of force ( Nm )

F = magnitude of force ( N )

d = perpendicular distance between force and pivot ( m )

Let us now tackle the problem !

Given:

mass of the object = M

gravitational acceleration = g

Asked:

vertical force at pier P = Fp = ?

vertical force at pier Q = Fq = ?

Solution:

If the bridge is in equilibrium position , then :

Learn moreImpacts of Gravity : Effect of Earth’s Gravity on Objects : The Acceleration Due To Gravity : Newton's Law of Motion: Example of Newton's Law:

Answer details

Grade: High School

Subject: Physics

Chapter: Moment of Force

Question was not very clear if there are specific answer choices tell me and i'll try to you more. hope this though2 laps is 1 min. we know that for each min she does two times the amount of laps. for 12 laps we can do 12/2 which does give us 12 laps in 6 mins not 16 mins.

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