An egg test dummy is fitted with a helmet and sealed in a plastic bag. The mass of
the egg, helmet, baggie, and paper clamp is 0.085 kg. The egg and its accessories
are attached to the swing and pulled back so that they are now 0.40 m above the
reference level. The egg is released and swings down to collide with the cement
block
a. Calculate the gravitational potential energy of the egg and its accessories when it
is 0.40 m above the reference level.
b. Determine the kinetic energy of the egg and its accessories when it collides with
the cement block. Explain how this energy is transformed in the collision.
c. Calculate the speed of the egg and its accessories the moment just before impact.

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).

Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.

Why are graphs useful when interpreting data