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do not know how to begin with this one

a shopper pushes a 8.7kg shopping cart up a 13 degrees incline, Find the horzontal force, F, needed to give the cart and acceleration of 1.37m/s2.

question 2

A 1.35g samara falls toward the ground with a constant speed of 1.3m/s. What is the force of air resistance exerted on the samara?

question 3

A 23 kg suitcase is being pulled by a handle that is at an angle of 25 degrees abouve the horizontal. If the normal force is exerted on the suitcase is 150N, what is the force F applied to the handle?

If you could point me in the right direction i would be very thankful.

Kelly