Question1
Two people are carrying a uniform wooden board that is 3.00 m long and weighs 160 N. If one person applies an upward force equal to 60 N at one end, at what point does other person lift? Begin with a free-body diagram of the board.
Question2
One litre of water at 43?C is used to make iced tea.How much ice at 0?C must be added to lower the temperature of the tea to 16?C? The specific heat of water is 1 cal/g ·? C and latent heat of ice is 79.7 cal/g.
Answer in units of g
Question3
A train moving with constant velocity travels 170north in 14 and an undecided distance to the west. The speed of the train is 36.
Find out the direction of the train's motion relative to north?
How far west has a train travelled in this time?