On Mars, the gravitational field constant is g = 3.7 N/kg. • a. How much would a 2.0 kg mass weigh on Mars? • b. If this object was allowed to fall for 4.0 s, what would be the new velocity of the rock, assuming no resistance with the atmosphere of Mars? • c. What distance would the object fall assuming no atmospheric resistance? d. When the object does encounter the atmosphere of Mars and reaches terminal velocity, what would the free-body diagram look like? Please label the forces involved.

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”