5.A rock is tossed from a height of 2 meters at an initial velocity of 30 m/s at an angle of 20 with the ground. Write parametric equations to represent the path of the rock.

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6.An airplane is taking off headed due north with an air speed of 173 miles per hour at an angle of 18 relative to the horizontal. The wind is blowing with a velocity of 42 miles per hour at an angle of S47E. Find a vector that represents the resultant velocity of the plane relative to the point of takeoff. Let i point east, j point north, and k point up.

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7.A 2600-pound truck is stopped at a red light on a hill with an incline of 25. Ignoring the force of friction, what force is required to keep the truck from rolling down the hill?

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8.While doing bicep curls, Tamara applies 155 Newtons of force to lift the dumbbell. Her forearm is 0.366 meters long and she begins the bicep curl with her elbow bent at a 15 angle below the horizontal, in the direction of the positive x-axis. Determine the magnitude of the torque about her elbow.

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