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Q1. A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37 degrees above the horizontal. If the mass of the box and the books is 40 kg, what is the normal force on box? a. 332 N b. 312 N c. 392 N d. 292 N

Q2. At t=0 a 1.0kg ball is thrown from a tall tower with v= (18i+24j) m/s. what is change U of the ball -Earth system between t=0 and t=6s a (still free fall)?

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Category:- Physics
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