Having the hardest time with this class

1. Jun 23, 2009

pokori

i have been on these last few problems since thursday of last week and im still lost can someone help me with one through 5

1.Shareen finds that when she drives her motorboat upstream she can travel with a speed of only 8 m/s, while she moves with a speed of 12 m/s when she heads downstream. what is the current of the river on which shareen is traveling?

2. Rochelle is flying to new york for her big broadway debut. If the plane heads out of Los Angeles with a velocity of 220. m/s in a northeast direction, relative to the ground, and encounters a wind blowing head on at 45 m/s, what is the resultant velocity of the plane, relative to the ground?

3. Amit flies due east from san francisco to washington to boston a displacement of 5600. km. He then flies from washingiton to boston, s displacement of 900. km at an angle of 55.0 degrees east of north. what is amit's total displacement?

4. Marcie shovels snow after storm by excercisong a force of 30.0 N on her shovel at an angle of 60.0 degrees to the vertical. what are the horizontal and vertical components of the force exerted by marcie?

5. Ivan pulls a sled loaded with logs to his cabin in the woods. If Ivan pulls with a force of 800. N in direction 20.0 degrees above the horizontal, what are the horizontal and vertical components of the force exerted by Ivan?

2. Jun 23, 2009

Staff: Mentor

Thread moved to the Homework Help forums.

Welcome to the PF. You must show us your attempts at the solutions for these problems before we can offer tutorial assistance. You should also show us the relevant equations involved in your questions.

Please post your work on a couple of the questions, so that we can be of assistance.