Moments
What is a moment also called?
A turning force
To find an area, you have to know the _ and the _ and then _ these two values together.
Height, base, multiply
A person will feel more pressure at the bottom of the ocean than at the surface of it. True or false.
True
What are the acceptable units of measurement for density? (3 answers)
g/cm3
kg/m3
g/cc
g/mL
Calculate the volume of a liquid with a density of 5.45g/cm3 and a mass of 65g.
11.93 cm3
I sit on top of a seesaw at 1.5 m of distance from the center. My current weight is 40 N. My friend sits 2.3 m away from the center on the other side of the seesaw and it balances the seesaw. How much does she weigh?
26.09 N
There is more pressure on the tip of a pin than the bottom of a bowling pin.
Air is incompressible but liquid is compressible. True or False?
False
What is the formula to find density?
Divide mass by volume
If my answer is in g/mL, what is the unit of measurement of my mass and volume?
Mass: grams
Volume: mL
What is the correct unit of measurement for
1. Force
2. Moment
3. Distance
1. Newtons
2. Newton meters
3. Meters
Find the pressure exerted by a force of 8000 newtons on an area of 25m².
320 pa
What is my output force if my input force on a closed 2cm2 tube is 200 N and the area of my output force is 10cm2
1000 N
A student measures the mass of an 8cm3 block of brown sugar to be 12.9g. What is the density?
1.619 g/cm3
The area of the television in contact with the table is 750cm². The pressure on the table is 1760 newtons/m². Work out the force exerted by the television on the table.
13,200 N
Given:
F1 = 3800 N
D1 = 12 m
F2 = 8300 N
D2 = 24 m
Are the moments balanced? If not, what must D2 be?
No.
D2 = 5.5 m
A lead rod is placed on a table. The rod is a cylinder with diameter 8m and height 20m. The force exerted on the table is 111.72 newtons. What is the pressure?
Answer in terms of pi
6.92pi pa
If the area of A1 = 0.001 m2 and the area of A2 = 0.1 m2 , input force F1 = 100 N, then the external output force F2 ?
10,000 N
Oil has a density of 0.8g/cc. Will it sink or float?
Float
Turning forces are broken down into 3 parts. What are these parts?
Weight and mass are equal. True or False?
Explain why.
False. They are codependent, but they don't mean the same. Weight is the mass of an object with gravity acting on it. Whereas mass is the amount of matter of an object.
An object is placed on a table. It exerts a force of 22 newtons on the table. The pressure on the table is 500 newtons/m². Calculate the area of the crate that is in contact with the table.
0.044m2
An engineering student wants to build a hydraulic pump to lift a 1,815 N crate. The pump will have two pistons connected via a fluid chamber. The student calculates that a force of 442 N will be exerted on the small piston, which will have an area of 50.2 cm2. What must the area of the large piston be to exert the desired force?
A2: 206,25 cm2
A machine shop worker records the mass of an aluminum cube as 176g. If one side of the cube measures 4cm. What is the density of the cube?
2.75 g/cm3
M1 = 800 Nm
F2 = 450 N
D2 = ?
1.78 m