RP2: Problem Set I:
1. A 6.0 kg block rests on top of a 7.0 kg block,
which is resting on a horizontal table.a.
What is the force exerted by the 6 kg block on
the 7 kg block (include magnitude and direction)
b.
What is the force exerted by the 7 kg block on
the 6 kg block?
2.
A 90 kg man and a 55 kg man have a tug-of-war.
The 90 kg man pulls on the rope such that the 55 kg man accelerates at 0.025
m/s2. What force does the rope
exert on the 90 kg man?
3.
You are dragging a box full of books from one
room to another. The box and books together have a combined weight of 134 N. If
the coefficient of static friction between the pavement and the box is 0.55,
how hard must to push in order to get the box moving?
4.
You move a 41 kg bookcase to a different place
in the house. If you push with a force of 65 N and the bookcase accelerates at
0.12 m/s2 , what is the coefficient of kinetic friction between the bookcase
and the carpet?
5.
You push a 13 kg table with a horizontal force
of 20 N, but it does not move. However, you push it when a horizontal force of
25 N and it accelerates at 0.26 m/s2. From this information, what
can you conclude about the coefficients of static and kinetic friction?
Static and Kinetic - Khan Academy
No comments:
Post a Comment