HELP, PLEASE!!!

1. A force of 85 N is needed to push a 10 kg mass up a 12" ramp with an acceleration of 25 W52. What is the coefficient of friction (it) between the ramp and the object? 2. An object is placed on a 51" ramp. If the coefficient of friction between the object and the ramp is 0.20, what is the object's acceleration? 3. A 10 kg mass rests on a 35 rarnp. A 15 N force tries to push the mass down the ramp. If the coefficient of friction between the ramp and the 10 kg mass is 0.155. what is its acceleration? 4. A 8 kg mass rests on a horizontal, friction-free surface. A 56 N force pushes it from the left, and a 92 N force pushes it from the right. A) What is the net force on the mass? B) What is its acceleration? 5. A 5 kg object is placed on a 31 ramp. If the coefficient of friction between the object and the ramp is 0.926, how much force is needed to push the objeCt drum the ramp with an acceleration of 4 ntfsz. 6. A force of 220 N is used to push the object shown below. Is the coefficient of friction is 0.21, what is the object's acceleration? 17 10 kg 7 '7. Find the magnitude and direction of the net force when the following two vectors are combined: DUN 15 N