I need some help with a few physics questions. I would like to understand how you arrived at the answers though... if that's not too much to ask. Thanks in advance!
4. Emily leaves her physics book of mass 1 kg on the top of the table that is inclined at an angle of 20°. What is the acceleration of the book if the coefficient of kinetic friction between the book and the inclined plane is 0.3
10. A boy pulls a toy cart of mass 2 kg with a force of 3 N at an angle of 60° with respect to the horizontal road. What is the acceleration produced by the cart?
I have about 3 more. Start w/ these?

Question

I need some help with a few physics questions. I would like to understand how you arrived at the answers though... if that's not too much to ask. Thanks in advance!
4. Emily leaves her physics book of mass 1 kg on the top of the table that is inclined at an angle of 20°. What is the acceleration of the book if the coefficient of kinetic friction between the book and the inclined plane is 0.3 
10. A boy pulls a toy cart of mass 2 kg with a force of 3 N at an angle of 60° with respect to the horizontal road. What is the acceleration produced by the cart?
I have about 3 more. Start w/ these?

anonymous · Answer

5. A man pulls a suitcase of mass 15 kg with a force "F" inclined at an angle of 60° to the horizontal. The frictional force between the floor and the wheels of the suitcase is 10 N. What is the force required to produce an acceleration of 0.1 m/s2 on the suitcase? 
8. The net force on a sailboat is 252 N, while the wind exerts a force of 325 N. What is the water-resistant force acting on the sailboat?
9. A parachutist of mass 75kg descends with an acceleration of 8 m/s2. What is the upward force exerted by the air on the parachutist?
Sorry they are so out of order....

apoorvk · Answer

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this what we call an FBD. Can you balance the forces and find the answer now?