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Finding velocities in F vs x graph 
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#1
Jun2310, 10:46 AM

P: 127

1. The problem statement, all variables and given/known data
A object of mass 3.00 kg is subject to a force Fx that varies with position as in the figure below. Find the work done by the force on the object as it moves as follows: (a) from x = 0 to x = 4.00 m (b) from x = 5.00 m to x = 10.0 m (c) from x = 11.0 m to x = 15.0 m. (d) If the object has a speed of 0.500 m/s at x = 0, find: speed at x = 5.00 m speed at x = 15.0 m 3. The attempt at a solution a. W=2.5N (4m) / 2 = 5J b. W=3N (5m) = 15J c. W=2.5N (4m) / 2 = 5J d. W=1/2 mv^{2}  1/2 mvo^{2} x=5m 15J = 3kg v  (3kg)(0.500m/s) v=2.29 m/s x=15m 0=3kg v  (3kg)(0.500m/s) v=0.5 m/s 


#2
Jun2310, 04:21 PM

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P: 3,442




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