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Dvinal [7]
3 years ago
6

Which characteristic does an object with a constant acceleration always have?

Physics
2 answers:
9966 [12]3 years ago
8 0

Explanation:

By definition, the word acceleration is equal to the rate of change of velocity. Mathematically, it is given by :

a=\dfrac{dv}{dt}

dv=a.dt

v=\int\limits^t_0 {a.dt}

Since, it is given that acceleration is constant

v=at+v_o

v₀ is the constant of integration and it corresponds to initial velocity

From above equation, it is clear that when acceleration is constant the speed varies linearly. Hence, when an object move with constant acceleration, it always changes its velocity.

lapo4ka [179]3 years ago
5 0
It always has changing velocity
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Answer:

207.4 N

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Therefore, torque is also given by

\tau = rF\sin \theta

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Use the expression of torque.

Substitute L for r in the equation \tau = rF\sin \theta

\tau = LF\sin \theta

Where L is the length of the wrench.

Making F the subject

F = \frac{\tau }{{L\sin \theta }}

Force required to pull the wrench is given as,

F = \frac{\tau }{{L\sin \theta }}

Substitute 47{\rm{ N}} \cdot {\rm{m}}  for \tau, 25 cm for L, and 115o for \theta  

\begin{array}{c}\\F = \frac{{47{\rm{ N}} \cdot {\rm{m}}}}{{\left( {25{\rm{ cm}}} \right)\sin {{115}^{\rm{o}}}}}\left( {\frac{{1{\rm{ cm}}}}{{{{10}^{ - 2}}{\rm{ m}}}}} \right)\\\\ = 207.435{\rm{ N}}\\\\ \approx 207.4{\rm{ N}}\\\end{array}  

6 0
3 years ago
An air conditioner has a power rating of 3000 W and is used daily. Its electrical
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Answer:

5.714 hours / day

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If a calorie is equivalent to 4.184 joules how many joules are contained in 250 kg calories slice of pizza
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In order to answer this, we will set up a simple ratio as such:

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