A body moves along a circle of radius 1 m with constant kinetic energy 25 J . Then the force acting on it is . (calculate the force
Divyankasc:
Mass ? of body
sorry by mistake
Mass no there ??
Answers
Answered by
0
work done = change in kinetic energy
therefore, no work has been done because kinetic energy is constant and work will only be done when kinetic energy changes .
therefore if work is 0J then,
W=Fs
0=F*1
0/1=F
0=F
therefore 0N force is acting on the body.
i hope that this will help u......................^_^
therefore, no work has been done because kinetic energy is constant and work will only be done when kinetic energy changes .
therefore if work is 0J then,
W=Fs
0=F*1
0/1=F
0=F
therefore 0N force is acting on the body.
i hope that this will help u......................^_^
thank u but the answer is 50N can u recheck your answer
how did u got that answer
because i have answers of questions but not solutions
Its wrong question actually i think u should give mass also of the object
but i have read that change in kinetic energy is also equal to work done and if kinetic energy is not changing work done is 0
Kinetic energy is 25 J by the way not 0
and its 1 m RADIUS..So, first u have to calculate the circumference...
On which it is moving
wt do u mean by constant kinetic energy
Mass of the body ?
Answered by
3
The body has constant kinetic energy. So it is moving with a constant speed or it is in uniform circular motion.
Let the mass of body = m
velocity = v
radius of circle = 1m
KE = 25J
⇒1/2 mv² = 25
⇒ mv² = 2*25
⇒ mv² = 50
Since it is in uniform circular motion, the only force acting on the body is centripetal force.
Force = mv²/r = 50/1 = 50N
Let the mass of body = m
velocity = v
radius of circle = 1m
KE = 25J
⇒1/2 mv² = 25
⇒ mv² = 2*25
⇒ mv² = 50
Since it is in uniform circular motion, the only force acting on the body is centripetal force.
Force = mv²/r = 50/1 = 50N
Arey haaaa
Thanks
U r wlcm:-))
I did not think about centripetal force.
Thanks pankhudi:))))
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