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A worker stands still on a roof sloped at an angle of 36 degrees above the horizontal. He is prevented from slipping by a static frictional force of 390 N. Find the mass of the worker.

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The projection of the mg on the inclined roof is mg*sin (36), which must be equal to the friction force of 390: When we solve for mass m using mg*sin (36) = 390, we obtain m=390/ (9.8*sin (36)) = 67.70 kg.

What are weight and mass?

A body's mass is used to calculate how much matter it contains. m or M are used to indicate mass. Weight is a unit of measurement for the force that gravity's acceleration has on a mass. W typically stands for weight.

Calculate the force required to accelerate a car with a rate of 5 ms-2 if the car weighs 1000 kg.

Given that Mass (m) = 1000 kg and Acceleration (a) = 5 m/s 2, what is Force (F)? We are aware that F = m a = 1000 k g 5 m / s 2 = 5000 k g m / s 2 Therefore, the needed force is equal to 5000 m/s2 or 5000 N.

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