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Home Q & A Board Science-Related Homework Help Physics
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nursing1 nursing1
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11 years ago
How do you calculate energy knowing the wieght of a projectile?
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wrote...
#1
11 years ago
Kinetic energy = 0.5*mass*velocity^2
wrote...
#2
11 years ago
What class is this for? Can you write out the problem?

Only thing I can think of is:

F = ma

F=force
m=mass
a=acceleration
wrote...
#3
11 years ago
Let v is the initial velocity
and m is the mass
h is the height from which projectile projected
Total energy will be 1/2mv^2+mgh  (neglect  energy loss due to friction)
As per energy conservation law this energy will be  same through out the motion.
wrote...
#4
11 years ago
Given a muzzle velocity V, the kinetic energy of a projectile of mass m is KE = 1/2 mV^2.  If you have the weight W = mg; you can find its mass m = W/g where g = 9.81 m/sec^2 near Earth's surface.  In which case the KE equation becomes:

KE = 1/2 mV^2 = 1/2 (W/g)V^2  ANS.
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