Map Sapling Learning A 3.09-kg object constrained to move along the x-axis is su

Question

Map Sapling Learning A 3.09-kg object constrained to move along the x-axis is subjected to a time-varying force as shown on the graph below. Find the change in the object's velocity over the specified time intervals a) Between 0 s and 5.99 s Force vs. Time Number 15 12 v | 23.26 m/s b) Between 4.89 s and 10s (N) Number m/s Av- 14.0 10 12 146I5 20 t (s) -12 02 46 c) Be 10 s and =17.5 s Incorrect Remember that the general form for the equation of a line is Number where M is the slope, x is the independent variable and 8 is the intercept. You can use this to determine the value of the att= 17.5 s. # Try Again NextExit Previous

Explanation / Answer

(A) change in momentum = area under the F vs t curve

= (12 x 5.99)

=71.88 kg m / s

delta(v) = delta(p) / m

= 23.26 m/s

(B) p = ((7 - 4.89)(12)) + ((10-7)(12)/2)

p = 43.32 kg m/s

v = p / m = 43.32 / 3.09 = 14.02 m/s

(C) p = - ((20-10)6/2) + ((20-17.5)(2.5)/2)

p = - 26.875 kg m/s

v = p / m = - 8.70 m/s

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