kidmd2b2005
Nov 1, 2006, 01:40 PM
The diagram shows a beam of length 7 and the sawhorses 2 meters from each end.
A man of mass mm = 95 kg decides to paint his house. To do this, he builds a platform using a uniform beam with a mass of mb = 92 kg and a length of L = 7 meters. The beam is supported by two sawhorses, as shown in the diagram above.
(a) If the man stands over the support at point B, calculate the force exerted by the beam on the support at A.
also I couldn't do this part:
Later that day, after thinking about how cool rotational dynamics really is, the man decides to conduct an experiment. He removes one of the supports and places the other 3 meters from the end closest to him. Standing at the end of the board, he has his daughter place paint cans, each of mass mc = 3.2 kg, on the opposite end. How many cans will the girl have to place on the board to provide the best balance? (You may neglect the actual length of the board that both the man and the cans occupy. Assume both are points at the ends of the board.) Also, take the axis of rotation about the sawhorse.
THANK YOU!!
A man of mass mm = 95 kg decides to paint his house. To do this, he builds a platform using a uniform beam with a mass of mb = 92 kg and a length of L = 7 meters. The beam is supported by two sawhorses, as shown in the diagram above.
(a) If the man stands over the support at point B, calculate the force exerted by the beam on the support at A.
also I couldn't do this part:
Later that day, after thinking about how cool rotational dynamics really is, the man decides to conduct an experiment. He removes one of the supports and places the other 3 meters from the end closest to him. Standing at the end of the board, he has his daughter place paint cans, each of mass mc = 3.2 kg, on the opposite end. How many cans will the girl have to place on the board to provide the best balance? (You may neglect the actual length of the board that both the man and the cans occupy. Assume both are points at the ends of the board.) Also, take the axis of rotation about the sawhorse.
THANK YOU!!