A particle of mass 0.2 kg is moving in One dimension under a force that delivers a constant power of 0.5 watt to the particle if the initial speed of the particle is zero the speed after 5 second is
Answers
Answered by
65
P = 0.5 watt.
in 5 sec., W= Pt
⇒0.5×5
work ⇒ 2.5 joule
W = ΔKE (work energy theorem)
2.5=1/2×0.2[v^2−0]
v = 5 ms^−1
in 5 sec., W= Pt
⇒0.5×5
work ⇒ 2.5 joule
W = ΔKE (work energy theorem)
2.5=1/2×0.2[v^2−0]
v = 5 ms^−1
Answered by
23
Consider the power of the particle P = 0.5 watt.
The watt is changed in five seconds. In 5 seconds, W = Pt, since 0.5 x 5.
Work is 2.5 joule.
According to the work energy theorem, W = KE. 2.5 = ½ x 0.2 (v2 -0).
Therefore, the speed of the particle after 5 second is 5 ms.
Similar questions