Ask Question
2 March, 06:42

A man weighing 180 lbf pushes a block weighing 100 lbf along a horizontal plane. the dynamic coefficient of friction between the block and plane is 0.2. assuming that the block moves at a constant speed, how much work is required to move the block 100 ft considering the (a) the block and (b) the man as the system.

+4
Answers (1)
  1. 2 March, 08:15
    0
    The first thing you should know is that the work is defined as:

    W = F * d

    Where

    F = force

    d = displacement

    We have then

    (a) the block

    F = (0.2) * (100) = 20

    d = 100

    W = (20) * (100) = 2000 ft. lbf

    (b) the man as the system.

    F = (0.2) * (100 + 180) = 56

    d = 100

    W = (56) * (100) = 5600 ft. lbf

    answer:

    (a) 2000 ft. lbf

    (b) 5600 ft. lbf
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “A man weighing 180 lbf pushes a block weighing 100 lbf along a horizontal plane. the dynamic coefficient of friction between the block and ...” in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers