Jerrikasmith28
30.12.2019 •
Physics
Aforce of 4.7 n acts on a 14 kg body initially at rest.
(a) compute the work done by the force in thefirst second.
1 j
(b) compute the work done by the force in the second second.
2 j
(c) compute the work done by the force in the third second.
3 j
(d) compute the instantaneous power due to the force at the end ofthe third second.
4 w
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Ответ:
(a). The work done by the force in the first second is 0.79 J.
(b). The work done by the force in the second second is 2.40 J.
(c). The work done by the force in the third second is 3.995 J.
(d). The instantaneous power due to the force at the end of the third second is 4.8 W.
Explanation:
Given that,
Force = 4.7 N
Mass of body = 14 kg
(a). We need to calculate the acceleration
Using formula of force
Put the value into the formula
We need to calculate the work done by the force in the first second
Using formula of work done
(b). We need to calculate the work done by the force in the second second
Using formula of work done
(c). We need to calculate the work done by the force in the third second.
Using formula of work done
(d). We need to calculate the instantaneous power due to the force at the end of the third second.
Using formula of power
Put the value into the formula
Hence, (a). The work done by the force in the first second is 0.79 J.
(b). The work done by the force in the second second is 2.40 J.
(c). The work done by the force in the third second is 3.995 J.
(d). The instantaneous power due to the force at the end of the third second is 4.8 W.
Ответ:
okay lolz
Explanation: