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Orlov [11]
3 years ago
8

If you push hard enough to make a scale read 9 pounds, that is about 40 Newtons. So Newtons are a smaller unit... True or False

Physics
1 answer:
Evgesh-ka [11]3 years ago
3 0

True.

Why?

To know if the statement is true or false, we just need to use the following convertion factor:

1lb(force)=4.44N

or

1N=0.22lbf

Now, converting from pounds to Newtons, we have:

9lb*\frac{4.44N}{1lb}=39.96lb=40lb

Hence, the statement is true.

Have a nice day!

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Explanation:

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A cart loaded with bricks has a total mass of 22.2 kg and is pulled at constant speed by a rope. The rope is inclined at 27.5 ◦
musickatia [10]

Answer:

W = 1.432 KJ

Explanation:

given,

mass = 22.2 Kg

angle of the rope = 27.5°

distance on the ground = 24 m

kinetic friction= μ = 0.32

acceleration due to gravity, g = 9.8 m/s²

Work done = ?

W = F d cosθ

a = 0 because it is moving with constant speed

equating all the forces acting  in x direction

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equating all the forces acting  in y direction

F sinθ + N -mg =0

now,

N = mg - F sinθ

putting value of N

F cosθ = μ mg -μ F sinθ

F (cosθ + μsinθ ) = μ mg

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F = \dfrac{0.32 \times 22.2 \times 9.8}{cos 27.5^0+0.32 \times sin27.5^0}

F =67.28 N

now,

W=F d cosθ

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W = 1.432 KJ

7 0
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pishuonlain [190]

Answer:

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Explanation:

7 0
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