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zmey [24]
2 years ago
9

How do you know which forces works for free bodies​

Engineering
1 answer:
miss Akunina [59]2 years ago
5 0

Answer:

Gravitational force (pulled downward by the Earth)

Normal force (pushed upward by the ground)

Applied force (pushed by the person)

Friction force (pulled opposite the direction of motion by the roughness of the ground)

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Comparison of density values determines whether an item will float or sink in water. For each of the values below, determine the
geniusboy [140]

Answer:

a) the object floats

b) the object floats

c) the object sinks

Explanation:

when an object is less dense than in the fluid in which it is immersed, it will float due to its weight and volume characteristics, so to solve this problem we must find the mass and volume of each object in order to calculate the density and compare it with that of water

a)

volumen for a cube

V=L^3

L=1.53in=0.0388m

V=0.0388 ^3=5.8691x10^-5m^3=58.69ml

density=m/v

density=13.5g/58.69ml=0.23 g/ml

The wooden block floats  because it is less dense than water

b)

m=111mg=0.111g

density=m/v

density=0.111g/0.296ml=0.375g/ml

the metal paperclip floats   because it is less dense than water

c)

V=0.93cups=220.0271ml

m=0.88lb=399.1613g

Density=m/v

density=399.1613/220.027ml=1.8141g/ml

the apple sinks   because it is  denser than water

4 0
3 years ago
 what can be done to prevent bridges from collapsing? ( give at least two examples)
ryzh [129]

Explanation:

the owner of the bridge and some workers

4 0
3 years ago
Which physical quantity measures fraction of the input energy a machine actually concerts into output energy ?
Dvinal [7]
The answer is Kinetic Power.
4 0
3 years ago
What is control flow in programming?
MakcuM [25]

Answer:

The control flow is the order in which the computer executes statements in a script. Code is run in order from the first line in the file to the last line, unless the computer runs across the (extremely frequent) structures that change the control flow, such as conditionals and loops.

Explanation:

hope it helps.

brainliest pls

7 0
3 years ago
What types of movement joints are required in a concrete masonry wall? In a brick masonry wall? Where should these joints be loc
oksano4ka [1.4K]

Explanation:

This movement structures relieve the tension of movement until they do injury. Pressure in masonry  walls requires large openings to alleviate the stress generated either by expansion of the stones. These junctions must be situated at the gaps of the door frame, the shift of direction and width and the uninterrupted wall vast stretches.

8 0
3 years ago
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