Answer:
a) W = 2746.8[J]
b) W = 2992.05 [J]
Explanation:
Work is defined as the product of force by distance. We must bear in mind that the force that performs the work is the one that acts in the same direction of displacement.
For this case, we must calculate the weight of the woman, the weight is defined as the product of mass by gravity.
where:
w = weight [N] (units of Newtons]
m = mass = 56 [kg]
g = gravity acceleration = 9.81 [m/s²]
![w=56*9.81\\w=549.36[N]](https://tex.z-dn.net/?f=w%3D56%2A9.81%5C%5Cw%3D549.36%5BN%5D)
a)
where:
F = weight = 549.36[N]
d = distance = 5 [m]
![W = 549.36*5\\W = 2746.8[J]](https://tex.z-dn.net/?f=W%20%3D%20549.36%2A5%5C%5CW%20%3D%202746.8%5BJ%5D)
b)
The new mass will be the combination of the mass of the woman plus that of the load.
![m_{new} = 56+5\\m_{new}=61[kg]](https://tex.z-dn.net/?f=m_%7Bnew%7D%20%3D%2056%2B5%5C%5Cm_%7Bnew%7D%3D61%5Bkg%5D)
![w_{new}=61*9.81\\w_{new}=598.41[N]](https://tex.z-dn.net/?f=w_%7Bnew%7D%3D61%2A9.81%5C%5Cw_%7Bnew%7D%3D598.41%5BN%5D)
The new work done.
![W =598.41*5\\W=2992.05[J]](https://tex.z-dn.net/?f=W%20%3D598.41%2A5%5C%5CW%3D2992.05%5BJ%5D)
Answer:
Our eyes are most sensitive to the wavelengths corresponding to the yellow and green colors of the spectrum. Flashy signs and some fire engines are painted in a yellowish-green color to attract our attention.
The unit for measuring current is an " ammeter ".
The unit for measuring voltage is a " voltmeter ".
The unit of measure for electrical current is the " Ampere ".
The unit of measure for potential difference (voltage) is the " volt ".
ThIs is the same type of problem
find out the time value
3 = 1/2*a*T^2
6/10 = t^2
t = 0.77 seconds
and the distance is given 5 m
thus speed ,= distance/time
speed = 5/0.77
= 6.45 m/s
the resistance that one surface or object encounters when moving over another.
"a lubrication system that reduces friction"
synonyms: abrasion, abrading, rubbing, chafing, grating, rasping, scraping, excoriation, grinding, gnawing, eating away, wearing away/down; More
the action of one surface or object rubbing against another.
"the friction of braking"
Friction is an important force because it is a force that affects motion. This force exerted by the surface of an object when another object moves against it is the result of molecular attractions between the objects' surfaces, and works in the direction opposite to the direction of the motion.
