Question

A technologically oriented diving coach wishes to analyze the vertical "push off" for members of the diving team. In order to do this, she simulates the diving process by having the athletes drop (free fall) from an adjustable height platform onto a "force-o-meter" which measures the vertical force the divers exert on the ground as a function of time. For a particular diver with a mass of 65.0 kg, she sets the adjustable height platform at 0.585 m and instructs the diver to free fall onto the "force-o-meter" and push off as she would in a dive. The computer readout shows that the diver was in contact with the meter for 0.750 s and that the force exerted on the platform may be described by the function F(t) = (12,000 N/s)t − (16,000 N/s2)t2 where the force will be in Newtons when the time is seconds. Determine the following. (a) speed of the diver when she lands on the meter (Enter your answer to at least two decimal places.) m/s (b) vertical upward impulse the meter imparts to the diver (Enter your answer to at least four significant figures.) N · s (c) speed of the diver when she leaves the meter m/s (d) height of the diver's jump after leaving the meter m.

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A technologically oriented diving coach wishes to analyze the
vertical "push off" for members of the diving team. In order to do
this, she simulates the diving process by having the athletes drop
(free fall) from an adjustable height platform onto a
"force-o-meter" which measures the vertical force the divers exert
on the ground as a function of time. For a particular diver with a
mass of 65.0 kg, she sets the adjustable height platform at 0.585 m
and instructs...

A force platform is a tool used to analyze the
performance of athletes measuring the vertical force that the
athlete exerts on the ground as a function of time. Starting from
rest, a 64.0-kg athlete jumps down onto the platform from a height
of 0.670 m. While she is in contact with the platform during the
time interval 0 < t < 0.800 s, the force she exerts
on it is described by the function
F = 9 200t −...

In an adventure movie, a 68 kg stunt woman slips off a ledge,
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initially leaving the ledge was zero. Her speed just before she hit
the air bag was 10 m/s.
a) What is the woman’s change in kinetic energy after she comes
into contact with the bag? (3400 J or -3400 J)
b) What is the total work done on the stunt woman while she...

Q1.Centripetal force is v^2/r. It is supplied by:
a. the rotation
b. some physical force, or else the object will move in a
straight line
c. it is the only force if the object is moving through a
gravitational field
d. none is needed if its speed is below a prescribed limit
Q2. The distance of an object from planet M is D. the
gravitatiolnal force on the object is F. If the distance is
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ch 6
1:
It is generally a good idea to gain an understanding of the
"size" of units. Consider the objects and calculate the kinetic
energy of each one.
A ladybug weighing 37.3 mg
flies by your head at 3.83 km/h
.
×10
J
A 7.15 kg
bowling ball slides (not rolls) down an alley at 17.5 km/h
.
J
A car weighing 1260 kg
moves at a speed of 49.5 km/h.
5:
The graph shows the ?-directed force
??...

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