Tom enlists the help of his friend John to move his car. They apply forces to the car as shown in the diagram. Here  F1 = 437 N  and  F2 = 365 N  and friction is negligible. In the diagram below, the mass of the car = 3500 kg, θ1 = −25° and θ2 = 12°. (Assume the car faces the positive x-axis before the forces are applied.)   (a) Find the resultant force (in N) exerted on the car. -magnitude: N - direction: (counterclockwise from the +x-axis) °   (b) What is the acceleration (in m/s2) of the car? - magnitude: m/s2 - direction: (counterclockwise from the +x-axis)

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!