Engineering Mechanics

Please help me solve this one!

A constant horizontal force of 10 lb rests on a body of smooth horizontal plane. The body starts from rest and is observed to move 250 ft in 5s.
a). What is the mass of the body?
b). If the force ceases to act at the end of 5s, how far will the body move in the next 5s?

Find each member. (method of sections)

Find each member and reactions. (by joint method)

PLEASE PO.. PATURO KUNG PANO KUMUHA NG REACTION AT PAANO ANG PAG MOMENT

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