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katen-ka-za [31]
3 years ago
10

A horizontal net force F is exerted on an object at rest. The object starts at x=0 m and has a speed of 4.0 m/s after moving 4.0

m along a horizontal frictionless surface. The net force F as a function of the object's position x is shown below
Physics
1 answer:
Alex_Xolod [135]3 years ago
8 0

Explanation:

The solution is be found in the attachment.

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Which of the following is a force acting at a distance
wariber [46]
D. gravitational force. is your answer hope this helps
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3 years ago
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A body travel according to the law x(t)=2t+3t3 calculate the accelaration of body at t=2s
faust18 [17]

Answer:

28m/s

Explanation:

Given law,

⇒ x(t) = 2t + 3t³

Where, t = 2s

Then,

⇒ x(2) = 2(2) + 3(2)³

⇒ 4 + 3(8)

⇒ 4 + 24

⇒ 28 m/s

Acceleration is 28m/s

4 0
3 years ago
If a football player does 39000 J of work, how much power does the football player exert in 5 minutes
Drupady [299]

Answer:

Power = 130 watt

Explanation:

Power is described as the ability to do work, it is also defined as the amount of work in Joules done in a given time in seconds. Mathematically, it is represented as:

power = \frac{work (J)}{Time (s)}

In this example, power is calculated as follows:

Work = 39000 J

Time = 5 minutes

converting the time from minutes to seconds:

1 minute = 60 seconds

∴ 5 minutes = 60 × 5 = 300 seconds

\therefore power = \frac{39000}{300} \\power = 130 watt

N:B the unit for power can also be represented as Joules/seconds or J/s or JS⁻¹

6 0
2 years ago
How did amphibians adapt to their changing environment ?
kobusy [5.1K]

Answer:

I think it is B

7 0
2 years ago
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it takes a hose 4 minutes to fill a rectangular aquarium 9 inches long, 13 inces wide, and 14 inces tall. how long will it take
Studentka2010 [4]

Answer: 43.58 min

Explanation:

Knowing the volume of a rectangular object is length x width x height, we have two volumes:

V_{1}=(9 in)(13 in)(14 in)=1638 in^{3}

V_{2}=(21 in)(25 in)(34 in)=17850 in^{3}

And we know it takes a time of 4 minutes to fill V_{1}.

If we want to know how long will it take the same hose to fill another tank with volume V_{2}, we can use the <u>Rule of three</u>, which is a mathematical rule to find out an amount that is with another quantity given in the same relation as other two also known:

1638in^{3} ---- 4min

17850in^{3} ---- ?

?=\frac{(17850 in^{3})(4min)}{1638 in^{3}}

Finally:

?=43.58 min

4 0
3 years ago
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