Newton's Laws and Forces Problems? Please help

Posted on 2014-01-09 15:20:00 in Physics by PHYSICS

Before I ask the questions-I would also love to actually understand and know how to do them. I'm trying my hardest to understand these, but I just can't understand because I'm not very good at Physics, and honestly we have a teacher who can't teach right. There's six problems-and I changed a few numbers from my homework, that way I can learn better. Honestly, I've been at this for 3 hours, and I just don't understand. Thankyou to anyone who can help me!



(1.) A man is pulling on a rope with a force of 50 N directed at an angle of 32 degrees to horizontal. What are the X and Y component forces?



(2.) A crate is pulled to the right with a force of 82.0 N, to the left with a force of 110 N, upward with a force of 565 N, and downward with a force of 235 N. What is the external force in the X and Y direction? What is the net external magnitude and direction that would result on this crate?



(3.) Two lifeguards pull on ropes attached to a raft. If they pull in the same direction, the raft experiences a net external force of 335 N to the right. If they pull in opposite directions, the raft experiences a net external force of 105 N to the left.



(4.)The net external force on the propeller of a 3.2 kg model airplane is 7 N forward. What is the acceleration of the airplane?



(5.) The net external force on a gold cart is 390 N North. If the cart has a total mass of 270 kg, what is the cart's acceleration?



(6.) A soccer ball kicked with a force of 13.5 N accelerates at 6.5 m/s^2 to the right. What is the mass of the soccer ball?

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