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Galina-37 [17]
3 years ago
11

In the graph, which two regions show the particle undergoing zero acceleration and negative acceleration respectively?

Physics
1 answer:
Eduardwww [97]3 years ago
3 0

Answer:

BC shows zero acceleration , and CD shows negative acceleration ⇒ C

Explanation:

Acceleration is the rate of change of velocity

So in the time velocity graph the slope of a line represents the

acceleration because the slope of the line is the change in y (velocity)

for the change of x (time)

If the line has positive slope, then the acceleration is positive

If the line has negative slope, then the acceleration is negative

If the line has zero slope, then the acceleration is zero

A line has positive slope if y increased when x increased

A line has negative slope if y decreased when x increased

A line has zero slope if it is a horizontal line, that means y constant and

x increased

Lets look to the graph

x-axis represents the time in seconds

y-axis represents the velocity in meters per second

→ Line AB:

y increased from 0.5 m/s to 1 m/s

x increased from 0 to 3 seconds

The slope of line AB is positive

<em>Line AB shows positive acceleration</em>

→ Line BC:

Y in the same value 1 m/s

x increased from 3 seconds to 4 seconds

The slope of line BC is zero

<em>Line BC shows zero acceleration</em>

→ Line CD:

y decreased from 1 m/s to 0 m/s

x increased from 4 to 6 seconds

The slope of line AB is negative

<em>Line CD shows negative acceleration</em>

<em></em>

<em>BC shows zero acceleration , and CD shows negative acceleration</em>

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A 55.0-g aluminum block initially at 27.5 degree C absorbs 725 J of heat. What is the final temperature of the aluminum? Express
andrew11 [14]

Answer:

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Explanation:

We have the equation for energy

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Here m = 55 g = 0.055 kg

ΔT = T - 27.5

Specific heat capacity of aluminum = 921.096 J/kg.K

E = 725 J

Substituting

     E = mcΔT

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     T - 27.5 = 14.31

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Final temperature of the aluminum = 41.8 °C

6 0
3 years ago
A force of 20.0 N is applied to a 3.00 kg object for 4.00 seconds. Calculate the impulse experienced by the object.​
GenaCL600 [577]

Answer:

Impulse = 80Ns

Explanation:

Given the following data;

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To find the impulse experienced by the object;

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Therefore, the impulse experienced by the object is 80 Newton-seconds.

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If a machine increases force it must apply the force over a long distance? True or false
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FALSE

HOPE THIS HELPS

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