Somone one show me how to do these problems. PLEASE show me !!! 1. A bag of suga

Question

Somone one show me how to do these problems. PLEASE show me !!!

1. A bag of sugar weighs 1.50 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth?

Answer is 1.113 N

Repeat for Pluto, where g is 0.665 times that on Earth. _______. I had put 0.739015 but it keeps sayin its wrong.

Find the mass of the bag of sugar in kilograms at each of the three locations.

Earth _____kg

Moon _____kg

Pluto _____kg

2. A 177.2-N bird feeder is supported by three cables as shown in the figure below. Find the tension in each cable..

left cable: _____N

right cable: ____N

bottom cable: ____ N

3. The systems shown below are in equilibrium. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless. (Let m = 2.97 kg and ? = 28.0

Explanation / Answer

1) W = M g/6

1.5 lb = 0.68 kg

W = 0.68*9.81/6= 1.112 N

now on pluto

W = 0.68*0.665*9.81= 4.436 N

mass doesnt change

0.68 kg at all three

2) bottom is obviously 117.2 N

sum in the x

right*cos(30) - left*cos(60) = 0

left = right cos(30)/cos(60)

now sum in the y

right sin(30) + left sin(60) - 177.2 = 0

right sin(30) + right sin(60)*cos(30)/cos(60) - 177.2 = 0

right = 88.6 N

then left = 88.6*cos(30)/cos(60)= 153.46 N

3) you didnt show the figure with the scales

4)
sum forces in the y

w2y + 110*sin(40) -202 = 0

w2y=131.3 N

now in the x
w2x - 110*cos(40)=0

w2x=84.27 N

w2 = sqrt(x^2 + y^2) = sqrt(131.3^2 + 84.27^2)= 156 N

alpha = arctan(y/x) = arctan(131.3/84.27)= 57.3 degrees

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.