A large rough ramp is inclined φ=35 degrees above the horizontal. A block of mass m...
A large rough ramp is inclined φ=35 degrees above the horizontal. A block of mass m = 5 kg is sliding on the board and the coefficient of kinetic friction between the block and the ramp is μk=0.3 . The block is tied
to a string of length L = 0.25 meters so that the block moves
about a circular trajectory. HINT: I'd recommend drawing the FBDs
from a side-view.
a) Draw a complete FBD of the block at the moment the block is at
the top of its trajectory.
b) Find the speed of the block at the top of its trajectory if the
tension in the string is 10 N.
c) Draw a complete FBD of the block at the moment the string is horizontal and the block is moving UP the ramp.
d) Find the speed of the block at the moment in part (c) if the
tension in the string is 20 N.
e) Find the acceleration of the block (in unit vector notation) at
the moment in part (c)
Homework Answers
We need to be careful about the direction of forces as tension force always act radially inward direction
in the string and centrifugal force act radially outward.
Add Answer to:
A large rough ramp is inclined φ=35 degrees above the
horizontal. A block of mass m...
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Help with explanation 12. A block of mass m sits at rest on a rough inclined...
Help with explanation
12. A block of mass m sits at rest on a rough inclined ramp that makes an anigle 0 wIl horizontal. W A) F> mg B)F>rng cos θ c)F > mg sin θ hat must be true about normal force F on the block due to the ramp?
As shown in the figure below, a 2.25-kg block is released from rest on a ramp of height h.
As shown in the figure below, a 2.25-kg block is released from rest on a ramp of height h. When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.0 cm that has a coefficient of kinetic friction μk = 0.520. Find h such that the block's speed after crossing the rough patch is 4.20 m/s. An object with a...
A block with mass m = 5.00kg slides down a surface inclined 36.9 ? to the horizontal (the figure (Figure 1)...
A block with mass m = 5.00kg slides down a
surface inclined 36.9 ? to the horizontal (the figure (Figure 1) ).
The coefficient of kinetic friction is 0.26. A string attached to
the block is wrapped around a flywheel on a fixed axis at
O. The flywheel has mass 8.16kg and moment of inertia
0.500 kg?m2 with respect to the axis of rotation. The string pulls
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A block (block 5) of mass m5 = 2.3 kg hangs from the end of a...
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Help with explanation
12. A block of mass m sits at rest on a rough inclined ramp that makes an anigle 0 wIl horizontal. W A) F> mg B)F>rng cos θ c)F > mg sin θ hat must be true about normal force F on the block due to the ramp?
A block with mass m = 5.00kg slides down a
surface inclined 36.9 ? to the horizontal (the figure (Figure 1) ).
The coefficient of kinetic friction is 0.26. A string attached to
the block is wrapped around a flywheel on a fixed axis at
O. The flywheel has mass 8.16kg and moment of inertia
0.500 kg?m2 with respect to the axis of rotation. The string pulls
without slipping at a perpendicular distance of 0.350m from that
axis.
Part A
What...
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