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3 years ago

A boy of mass 50 kg exerts a pressure of 25000 pa calculate the area

Physics

1 answer:

gtnhenbr [62]3 years ago

3 0

Answer: A = 0.02 m²

Explanation: Solution:

Pressure is expressed in the formula:

P = F / A where F = mg

= mg /A

= 50 kg ( 9.8 m/s²) / 25000 Pa

= 0.02 m²

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Two workers are sliding 290 kg crate across the floor. One worker pushes forward on the crate with a force of 430 N while the ot

m_a_m_a [10]

Answer:0.27

Explanation:

Given

One worker Pushes with force $F_1=430 N$

other Pulls it with a rope of rope $F_2=360 N$

mass of crate $m=290 kg$

both forces are horizontal and crate slides with a constant speed

Both forces are in the same direction so Friction will oppose the forces and will be equal in magnitude of sum of two forces because crate is moving with constant speed i.e. net force is zero on it

$f_r=F_1+F_2$

where $f_r$ is the friction force

$f_r=430+360$

$f_r=790 N$

$f_r=\mu N$

where $\mu$ is the coefficient of static friction

$N=mg$

$790=\mu 29\cdot 9.8$

$\mu =0.27$

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3 years ago

Which item is not considered electromagnetic energy?

suter [353]

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3 years ago

Prove the identity <br>Trigonometry grade 10

g100num [7]

Answer:

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