Question

1a) The magnet's mass is 5.83 kg and the magnetic force pulling it to the right is 121.7 N. The length of the cord is 1.72 m, and the ceiling is 3.35 m above the floor. Suppose that you cut the cord and the magnet falls to the floor while still being pulled to the right by the force of 121.7 N. How long will it take the magnet to hit the floor?

1b) the magnet has mass 5.77 kg, the force pulling it to the right is 187.6 N, the cord has length 1.77 m and the ceiling is 2.89 m above the floor. How far to the right of its start point will the magnet have traveled when it hits the floor after the cord is cut?

Answer #1

Same situation as in the previous two problems this time the
magnet s mass is 4.95 kg and the magnetic force pulling it to the
right is 160.9 N. The length of the cord is 1.38 m, and the ceiling
is 3.32 m above the floor. Suppose that you cut the cord and the
magnet falls to the floor while still being pulled to the right by
the force of 160.9 N. How long will it take the magnet to...

A magnet of mass 5.75 kg is suspended from the ceiling by a cord
as shown. A large magnet is somewhere off to the right, pulling on
the small hanging magnet with a constant force of F = 125.2 N. At
what angle theta ?with respect to the vertical does the magnet
hang?

1a. a box of dirty money (mass m1
= 3.5 kg) on a frictionless plane inclined at angle θ1 =
37°. The box is connected via a cord of negligible mass to a box of
laundered money (mass m2 = 1.3 kg) on a
frictionless plane inclined at angle θ2 = 54°. The
pulley is frictionless and has negligible mass. What is the tension
in the cord?
1b. three blocks attached by cords that loop over frictionless
pulleys. Block B lies...

A pendulum is constructed from a 4.6 kg mass attached to a
strong cord of length 0.9 m also attached to a ceiling. Originally
hanging vertically, the mass is pulled aside a small distance of
8.1 cm and released from rest. While the mass is swinging the cord
exerts an almost-constant force on it. For this problem, assume the
force is constant as the mass swings. How much
work in J does the cord do to the mass as the...

1.) you and a friend are pulling a large 100 kg box across the
floor .your friend pulls right with a force 270N. your friend pulls
east
2.) you and a friend are sliding a large 100 kg box across the
floor .your friend pulls to the right with a force of 270 N. you
push to the right with a force of 300n .the frictional force
opposes with a force of 500 N .what is the acceleration of
thebox?...

(a) A constant 20 N force pushes a small ball in the direction
of the force over a distance of 5.0 m. What is the work done by the
force?
(b) A toy cart is pulled a distance of 6.0 m in a straight line
across the floor. The force pulling the cart has a magnitude of 20
N and is directed at 37° above the horizontal. What is the work
done by this force?
(c) A sled plus passenger...

1a. OK, this is the last time for one of these crazy adventures.
THIS time, though, there is a window in the floor, and you can see
that you re in a rocket which has just taken off from the surface
of an alien planet. By taking careful measurements out that window
you determine that the rocket is accelerating upward at 7.12 m/s^2.
When you drop a ball from a height of 2.40 m, it hits the floor
0.279 s...

A sled with mass 15 kg moves in a straight line on a horizontal
surface as it is being pulled by a force F at an angle of 30°with
the direction of motion. A force of friction of 10 N acts on the
sled. At one point in its path, its speed is 4.0 m/s; after it has
traveled a distance 5.0 m beyond this point, its speed is 7.0
m/s.
Use the work-energy theorem to find the total work...

6) You are pulling a 175 kg refrigerator across a horizontal
surface with a force of 310 N at an angle of 17 degrees above the
surface. The coefficient of kinetic friction between the floor and
the refrigerator is 0.19. The refrigerator moves a distance of 16
m. In the first answer box enter the work you do and in the second
answer box enter the work done by kinetic friction.
Answer 1 of 2:
Answer 2 of 2:

A box with mass 1.74 kg is being pulled across a rough surface
at a constant speed with a coefficient of kinetic friction
µk = 0.366. The pulling force has a magnitude of 11.2 N
and is directed at an angle 32.8 degrees above horizontal. If the
box is dragged a distance of 10.3 m, what is the total energy lost
to friction? (Hint: be sure to account for the upward component of
the pulling force, and note that the...

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