4. Figure A: A varying force (N) is applied to a 5.00 kg crate as it moves in th
ID: 1290514 • Letter: 4
Question
4. Figure A: A varying force (N) is applied to a 5.00 kg crate as it moves in the x- direction. How the force varies with position is given on the F vs. x graph. The work (J) done by this force Closest to: as the crate moves from x = 3 cm to x = 14 cm is a) 5.3 b) 0.39 c) 1.4 d) 3.6 e) 4.1 4.5 g) 0.56 h) 0.95 i) 2.9 j) 2.1 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 500N. What is the tension (kN) of the elevator cable? a) 0.752 b) 0.806 0.500 d) 0.326 e) 4.12 coo g) 0.694 f)0.411 h) 0.194 i)2.50 j)3.50Explanation / 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