# PAT questionWatch

#1
If anyone could take the time to answer this for me so I can check my answer it'd be much appreciated.
14. This problem concerns the mathematical treatment of a simple model
of an electric toy car of mass m, which is initially stationary. The bat-
teries in the car can be considered as an electrical power source with
constant power P. You may neglect air-resistance and other experi-
mental imperfections in the calculations.
(a) Suppose that the car is placed on a level surface and that the
motor can be treated as a device which converts electrical energy
directly into kinetic energy. Calculate the kinetic energy of the
car as a function of time, and hence its velocity as a function of
time.
0
quote
5 years ago
#2
If you want to check your answer you need to post it here for us to take a look at it.
quote
5 years ago
#3
(Original post by HenryD)
If anyone could take the time to answer this for me so I can check my answer it'd be much appreciated.
14. This problem concerns the mathematical treatment of a simple model
of an electric toy car of mass m, which is initially stationary. The bat-
teries in the car can be considered as an electrical power source with
constant power P. You may neglect air-resistance and other experi-
mental imperfections in the calculations.
(a) Suppose that the car is placed on a level surface and that the
motor can be treated as a device which converts electrical energy
directly into kinetic energy. Calculate the kinetic energy of the
car as a function of time, and hence its velocity as a function of
time.
hint: E=Pt from the definition of power just go from there with your relationship between time, distance and speed
0
quote
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