The position vector of the bullet has components
The bullet hits the ground when , which corresponds to time
:
The bullet travels 168 m horizontally, which would require a muzzle velocity such that
How high would a 75 kg hiker have to climb to increase her potention by 12000 J
1 answer:
16.33m
Explanation:
Given parameters:
Mass of the hiker = 75kg
Potential energy = 12000J
Unknown:
Height = ?
Solution:
The potential energy is the energy at rest of a body.
Potential energy = mgh
m is the mass of the hiker
g is the acceleration due to gravity
h is the height
The unknown is the height;
Height =
Height = = 16.33m
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Answer:
ZERO
Explanation:
As we know that force due to magnetic field on moving charge is given by
now here we can say that the force due to magnetic field is always perpendicular to the velocity and it is also perpendicular to the magnetic field.
So we can say that
so power due to magnetic field is always zero
which shows that rate of work done by magnetic field on moving charge is zero
so here the work done by magnetic field is always zero