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A cart on a horizontal, linear track has a fan attached to it. The cart is positioned at one end of the track, and the fan is turned on. Starting from rest, the cart takes 4.45 second to travel a distance of 1.35 meter. The mass of the cart plus fan is 385 gram. Suppose that the cart travels with constant acceleration.
(a) Find the net force exerted on the cart-fan combination?
...... N
(b) Mass is added to the cart until the total mass of the cart-fan combination is 649 gram, and the experiment is repeated. Compute how long does it take for the cart, starting from rest, to travel 1.35 meter now? Neglect the effects due to friction.
.......s
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