Chapter 6: kinetics of a particle
he 2.5 mg car as shown in is figure 6-50 being towed by a winch. if the winch exerts a force of
t = (225s) n on the cable, where s is the displacement of the car in meters, determine the
velocity of the car when s = 10 m, starting from rest. neglect rolling resistance of the car.
(ans: v = 3 m/s)
the 10ke crate as shown in figure 6-51 has an initial velocity of 2 m/s on the inclined plane,
Work done by winch = kinetic energy of car
∫ T ds = ½ mv²
∫ 225s ds = ½ mv²
225/2 s² = ½ mv²
225 s² = mv²
v = 15s / √m
Given s = 10 m and m = 2500 kg:
v = 15 (10) / √2500
v = 3 m/s
if the person is shown to have +90n, then ans is -10n.
if the person is shown to have -90n, then ans is +10n.
he 2.5 mg car as shown in is figure 6-50 being...