Answer:
Resultant force = 8.6N
Explanation:
Using Pythogorus' theorem
Resultant force = 8.6N
Answer:
9.2m
Explanation:
Think of the woman's path as a triangle. She walks 7m horizontally and 6m vertically. These are the two legs of a triangle. In order to find her distance from the origin, we can use pythagorean theorem to find the hypotenuse of the triangle. The hypotenuse will give us the direct measurement from the origin (0,0) to her current point (7,6).
a²+b²=c²
(7)²+(6)²=c²
49+36=c²
85=c²
Find the square roots of both sides to get c=9.21954...
Round your answer to the nearest 10th:
c=9.2m
The woman is approximately 9.2m from the origin.
<h3>
<u>Option</u><u> </u><u>A</u><u>:</u><u> </u><u>1</u><u>9</u><u>.</u><u>5</u><u> </u><u>W</u></h3>
Power of TV = 65Watt
If Efficiency = 70%, then the percentage of energy wasted is 30%
So, the amount of energy getting wasted:
= 30/100 × 65
= 1950/100
= 195/10
= 19.5 W
Answer:
<em>16275 Joule</em>
Explanation:
<u>Work Done By A Constant Force
</u>
The work can be computed as
W=F.X, where F is the applied force (in this case, the force needed to overcome gravity)
Recall the second Newton's law which states that
Being the net force on a system of mass m and acceleration a
We know the helicopter is applying force against gravity because the speed of the shipwreck survivor changes from 4 m/s to 0 m/s in 15 meters
Let's calculate that acceleration by using the dynamics equation
Solving for a
a=-0.533\ m/sec^2
The negative sign indicates the body is braking, we'll later use the magnitude
The net force is, then
The only two forces acting upon the survivor is the lifting force of the helicopter and the weight of the man, so
Finally, the work done by the helicopter is
The work done by the helicopter is
It is a completely false statement that to form a negative ion, an atom will <span>give up an electron to gain stability. The correct option among all the options that are given in the question is the second option. Negative ion has more electrons and so it would be wrong to say that it will give up an electron. I hope the answer has helped you.
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