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4 years ago

Is the SI unit of work newton?

Physics

2 answers:

Naya [18.7K]4 years ago

7 0

Answer:

Newton is the SI unit for force . Newton is kg m2

notsponge [240]4 years ago

6 0

Answer:

Explanation:

The s.i. unit of work is Joules. Work is measured in Joules. It is the product of force and the distance moved in the direction of the force. Force is in Newton while distance is measured in metres.

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An apple falls out of a tree from a height of 2.3 m What is the impact speed of the apple?

ivann1987 [24]

Answer:

6.72 m/s

Explanation:

recall that the equations of motion may be expressed as

v² = u² + 2as

where,

v = final velocity,

u = initial velocity = 0 m/s because it is stationary before it starts falling

a = acceleration (in this case because it is falling, it is the acceleration due to gravity = 9.81 m/s²)

s = distance traveled = 2.3m

in our case, if we neglect air resistance, then we simply substitute the known values above into the equation of motion.

v² = u² + 2as

v² = 0² + 2(9.81)(2.3)

v² = 45.126

v = √45.126

v = 6.72 m/s

6 0

4 years ago

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You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between

Fudgin [204]

Answer:

$(a)\;V=0.058\;m/s\\(b)\;v_{2f}=0.1002\;m/s$

Explanation:

Given,

Mass of ball $m_{1}=0.4$ kg

Speed of ball $v_{1i}=11$ m/s

Mass of persona $m_{2}=75$ kg

(a) The person is at rest initially. So, by the conservation of momentum

$p_{i}=p_{f}\\m_{1}v{1i}+m_{2}v_{2i}=(m_{1}+m_{2})V\\0.4\times 11+75 \times0=(0.4+75)V\\V=0.058\;m/s$

(b) Final speed of ball $v_{1f}=-7.8\;m/s$

$p_{i}=p_{f}\\m_{1}v{1i}+m_{2}v_{2i}=m_{1}v{1f}+m_{2}v_{2f}\\0.4\times 11+75 \times0=0.4\times(-7.8)+75v_{2f}\\v_{2f}=0.1002\;m/s$

3 0

4 years ago

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What is the wavelength of a wave that has a speed of 300 meters/second and a frequency of 150 hertz?

AleksAgata [21]

I would say 2 but I don’t want to get you wrong

4 0

3 years ago

Which of these is an example of energy?

zysi [14]

Answer:

The answer is Wind Blowing.

Explanation:

7 0

3 years ago

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If I am plotting a graph to my physics practical result. If they ask me to find the x-intercept, what should I consider when plo

Virty [35]

Answer:

• When getting x-intercept, your vertical axis or y-axis must have it's callibration and demarcation starting from zero.

Explanation:

As well as when getting y-intercept, your horizontal axis or x-axis must have it's callibration and demarcation starting from zero.

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7 0

3 years ago