A 100 N force pulls a 25 kg box at constant speed along a horizontal table. What

Question

A 100 N force pulls a 25 kg box at constant speed along a horizontal table. What is the value of the coefficient of kinetic friction between the table and the box? 0.1 0.25 0.3 0.4 A person of weight 480 N stands on a scale in an elevator. What will the scale be reading when the elevator is decelerating upward at 1.00 m/s^2 ? 490 N 470 M. 528 N 432 N 500 N Waldenia and Carpuccio are accelerating a wagon a acceleration of a. Each person Is pulling the same force in the same direction. If Waldenia falls into the wagon, effectively doubling its mass and Carpuccio continues to pull in the same way, the acceleration of the wagon will be a/2 4a 3/2a a/4 1/(2a) In the pulley system shown below, a force of 50 N moves thru a distance of 1 meter and raises the weight on the table a distance h. What is the weight and how high does it rise? 50 N and 1 meter 100 N and 50 cm 200 N and 25 cm 400 N and 50 cm 500 N and 25 cm

Explanation / Answer

here,

14)

force , F = 100 N

mass , m = 25 kg

let the coefficient of kinetic friction be uk

the frictional force , ff = uk * m * g

as the object is moving at constant speed

the accelration is zero

F - ff = 0

F - uk *m * g = 0

100 - uk * 9.8 * 25 = 0

uk = 0.4

the coefficient of kinetic friction is D) 0.4

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