Question

You are doing an experiment to measure coefficients of friction. As part of the experiment, you pull a block across a table at a constant speed using a string. The string pulls the block at an angle of 22 degrees above the horizontal with a magnitude of 14 N. The weight of the block is 34.4 N. What is the coefficient of friction between the block and the table? (You will need to include several decimal places in your answer.) [Note: if you need to enter a number in scientific notation, use 'e! For example, 1200 = 1.2e3 and 0.0012 - 1.2e-3. Include several decimal places in your calculations and your answer to avoid rounding error. Do not include units with your answer.) Question 13 1 pts

Answer 1

Here,

as the object is moving with constant speed

the net force on the object must be zero

Normal force, N = 34.4 - 14 * sin(22)

N = 29.16 N

let the coefficient of friction is u

frictional force = u * N = applied force in horizontal direction

14 * cos(22 degree) = u * 29.16

u = 0.45

the coefficient of kinetic friction is 0.45