4. Figure A: Varying force (N) is applied to a 5.00 kg crate as it moves the x-

Question

4. Figure A: Varying force (N) is applied to a 5.00 kg crate as it moves the x- direction. How the force varies with Position is given on the F vs. x graph. The work (J) done by this force as the crate moves from x = 3 cm to x = 14 cm Is Closest to: a)5.3 b)0.39 c)1.4 d)3.6 e)4.1 f) 4.5 g) 0.56 h) 0.95 i) 2.9 5. Figure B shows a cat (meow) elevator that is moving downward. Its downward speed is decreasing at the rate of 6.0 m/s^2. The weight of the elevator is 500 N. What is the tension (kN) of the elevator cable? a) 0.752 b) 0.806 c) 0.500 d)0.326 e) 4.12 f)0.411 g) 0.694 h)0.194 i) 2.50 j) 3.50

Explanation / Answer

a)
work w=force*displacement
=mg*(14-3)*10^-2
=5*9.8*11*10^-2
=5.39 J ..is answer
b)
tension T=mg+ma
and
given
weight is mg=500N
m=500/g
m=500/9.8
m=51.02 kg
now
T=m(g+a)
T=51.02(9.8+6)
T=806.116 N ...is answer
T=0.806 kN....is answer

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