Impulse is the product of a force and the blank during which that force acts
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#1
for the block of mass 5 kg normal force is given as
friction force is given as
Net force is given as
now we know that
#2
Normal force is given as
now we know that
as object moves with constant velocity
now for coefficient of friction we can use
#3
net force upwards is given as
mass is given as
now as per newton's law we can say
#4
As we know that when block is sliding on rough surface
part a)
net force = applied force - frictional force
part b)
for coefficient of friction we can use
here normal force is given as
now we have
#5
if an object is initially at rest and moves 20 m in 5 s
so we can use kinematics to find out the acceleration
now net force is given as
#6
an object travelling with speed 25 m/s comes to stop in 1.5 s
so here acceleration of object is given as
now the force is gievn as
The Lorentz force acting on the proton is equal to:
where
q is the proton charge
v is the proton speed
B is the intensity of the magnetic field
is the angle between the direction of v and B
since the proton travels perpendicularly to the magnetic field, in this case
, so the Lorentz force in this case is simply
The magnetic force provides also the centripetal force that keeps the proton in circular motion:
where
m is the proton mas
r is the radius of the orbit
If we re-arrange this equation and we use the data of the problem, we can find the radius of the orbit:
where
q is the proton charge
v is the proton speed
B is the intensity of the magnetic field
since the proton travels perpendicularly to the magnetic field, in this case
The magnetic force provides also the centripetal force that keeps the proton in circular motion:
where
m is the proton mas
r is the radius of the orbit
If we re-arrange this equation and we use the data of the problem, we can find the radius of the orbit: