A 0.5 kg fan cart was moving with a speed of 1 m/s when its fan was turned on for 3 seconds. The fan produces a forward force on the cart of 4 N. 4 N of resistance acted on the cart. Determine the acceleration of the cart during the 3 second interval. Determine the velocity of the cart at t = 3 seconds. !

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5