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Goshia [24]
4 years ago
13

A person rolls a barrel up an inclined plane with a length of 6m and a height of 3m/ How much force is needed to roll up the bar

rel the length of the inclined plane if the barrel weighs 500N? How much work is done on the barrel?
Physics
1 answer:
snow_lady [41]4 years ago
8 0

Answer:

Length (l) = 6 m

height (h) = 3 m

Load(L) = 500 N

Effort (E) = ?

we know the principal that

E * l = L * h

6 E = 500 * 3

6E = 1500

E = 250

therefore 250 N work is done on the barrel.

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A 2130 kg car is parked on a hill that makes a 15º angle with the horizontal. What is the normal force on the car?
valentinak56 [21]

Answer:

20573.67N

Explanation:

Given;

mass (m) of the car = 2130kg

angle of inclination Θ = 15⁰

The normal force (F) on the car is given by

F = mgcosΘ

where g is the acceleration due to gravity.

Taking g as 10m/s^{2} and substituting the values of m and Θ into the equation. We have;

F = 2130 x 10 x cos 15⁰

F = 2130 x 10 x 0.9659

F = 20573.67N

Therefore the normal force on the car is 20573.67N

7 0
4 years ago
Atmospheric pressure is greater at the base of a mountain than at
aliina [53]

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The water is pretty much unsquishable.

Biut the air in there can be <em>COMPRESSED</em>.  The air gets squished into a smaller space, and the bottle wrinkles in slightly.

8 0
3 years ago
An atom is chemically stable when it’s outer_____ is completely filled with _____.
Svetlanka [38]

an atom is chemically stable when its outer layer is completely filled with energy. im pretty sure this is right

8 0
3 years ago
A Chef is looking for a new frying pan that will allow her to cook food quickly at temperatures above 500°C. Use the data provid
makvit [3.9K]

Answer:

Explanation:

1st one

What is your evidence?

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3 years ago
What is the kinetic energy of a 0.135kg baseball thrown at 40.0m/s?
mihalych1998 [28]
KE = 1/2 MV^2

so 
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7 0
3 years ago
Read 2 more answers
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