the floor. (a) What force does the floor exert on the block? (b) If a rope is ti

Question

the floor.

(a) What force does the floor exert on the block?

(b) If a rope is tied to the block and run vertically over a pulley, and the other end is attached to a free-hanging 12.0-lb weight, what is the force exerted by the floor on the 18.0-lb block?

(c) If we replace the 12.0-lb weight in part (b) with a 36.0-lb weight, what is the force exerted by the floor on the 18.0-lb block?

magnitude   lb direction ---Select--- upward downward The floor does not exert force on the block. No Service 11:30 AM webassign.net 82% For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer Assignment Scoring Your last submission is used for your score 1. + -/6 points SerPSET9 5.P.021 My Notes Ask Your Teac A 18.0-lb block rests on the floor. (a) What force does the floor exert on the block? magnitude direction | Select Ib (b) If a rope is tied to the block and run vertically over a pulley, and the other end is attached to a free-hanging 12.0-lb weight, what is the force exerted by the floor on the 18.0-lb block? magnitude direction !--Select lb (c) If we replace the 12.0-lb weight in part (b) with a 36.0-lb weight, what is the force exerted by the floor on the 18.0-lb block? magnitude directionSelect. lb Need Help?Read It 2. + -/8 points SerPSET9 5.P.023. My Notes Ask Your Teac

Explanation / Answer

a)

W = weight of block = 18 lb

Fn = normal force acting on the block

force equation for the block on the floor is

Fn = W = 18 lb

direction : Upward

b)

W2 = weight of hanging block = 12 lb

W = weight of block on the floor = 18 lb

Fn = normal force on the block on floor

T = tension in the rope

for the hanging block , force equation is given as

T = W2 = 12 lb

for the block on the floor :

Fn + T = W

Fn + 12 = 18

Fn = 6 lb

c)

Fn = 0

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