Kinematics Problem Solving

brontidegrrrΜηχανική

14 Νοε 2013 (πριν από 3 χρόνια και 6 μήνες)

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Inertia Lab


Purpose:


To investigate and experience the phenomenon known as inertia.


Materials:


C Clamp, (2) 0.2 kg Masses, Thread


Procedure:


Attach C Clamp on the edge of a lab bench.


Take two pieces of thread about 25 cm long. Tie loops in each

end with simple overhand knots.


Hang one 0.2 kg mass off the C Clamp.


Hang the second 0.2 kg mass
gently

from the bottom of the first mass.


Grasp the lower mass and pull directly downward slowly until a thread breaks. Be prepared to catch the masses
wh
en the thread breaks.


Set up the experiment again, now grasp the lower mass and pull down VERY quickly. Be prepared to catch the
masses when the thread breaks.




Conclusion:


State and explain the results of both cases.










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01857b87483a.doc

Inertia Worksheet


1.

What

is the net force on a cart pulled to the right with 100 N and to the left with 30 N?





2.

Consider a book that weights 15 N at rest on a flat table. How many newtons of support force does the table
provide? What is the net force on the book?





3.

A bowling
ball at rest is at equilibrium. Is the ball in equilibrium when it moves at a constant speed in a
straight line?





4.

If you push a crate with a force of 100 N and it slides at constant velocity, how much friction is acting on
the crate?





5.

Asteroids have
been moving through space for billions of years. What keeps them moving?




6.

A bowling ball slow slightly as it goes down the alley. Does this violate Newton’s law of inertia?




7.

Consider a pair of force, one having a magnitude of 20 N, and the other 12 N.

What maximum net force is
possible for these two forces? What is the minimum bet force possible?





8.

Can object be in equilibrium when a single force acts on it? Explain.




9.

Why do you lurch forward in a car that suddenly slows? Conversely why do you lurc
h back as the car
accelerates?




10.

Can an object be in equilibrium when three forces act on it, all a different angles? Explain.