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A boat crosses a 150 m wide river flowing at 8.0 m/s to reach a dock directly on the other side.  If the boat motor can propel the boat at 10.0 m/s across the water, how long (in seconds) will it take the boat to reach the dock assuming it travels in a straight line)?

An object is thrown with a speed 35 m/s at an angle of 250 up from the horizontal from the top of a 55 m tall cliff.  How far from the base of the cliff does the object land? 

prob 22 pic.png Determine the direction (in deg) measured counter-clockwise from the positive x-direction of the acceleration for m = 2.0 kg, F1 = 4.0 N, F2 = 5.0 N, F3 = 3.0 N, θ1 = 35.00, and θ2 = 20.00.

Prob 9 pic.png A person is lowered by a rope as shown.  If the person is accelerating downward at 2.0 m/s2, determine the tension in the rope if the mass of the person is 75 kg.

A tennis player serves a ball horizontally at a height h = 3.0 m a distance d = 14.0 m from the net.  What minimum speed must the ball be served so as to clear the 1.00 m tall net?Quiz Projectile Motion problem 8.png

Match the quantities to their descriptions.

Prob 9 pic.png A person is suspended by a rope as shown.  If the person is simply hanging from the rope (acceleration = 0 m/s2), determine the tension in the rope if the mass of the person is 95 kg.

Prob 9 pic.png A person is hoisted by a rope as shown.  If the person is accelerating upward at 2.0 m/s2, determine the tension in the rope if the mass of the person is 75 kg.

prob 12 pic.png Determine the normal force (in N) on the object for m = 5.0 and θ = 35.00.

prob 20 pic.png An object of mass m = 80 kg is pulled over a frictionless surface by two horizontal forces as shown.  Determine the magnitude of the acceleration   for F1 = 110 N, F2 = 185 N, q1 = 200, and q2 = 500.