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in a lab investigation. one group of students (group A) measures the speed of a 0.1-kilogram car at 2.5 m/sec at the bottom of a hill. Another group of students (group B) measures the speed of the car at 3 m/sec at the bottom of the hill. the car's starting position at the top of the hill is one-meter high. what is the potential energy of the car at the beginning of the experiment before its speed is measured?

Respuesta :

skyluke89
The potential energy of the car at the top of the hill, before the beginning of the experiment, is given by
[tex]U=mgh[/tex]
where [tex]m=0.1 kg[/tex] is the mass of the car, [tex]g=9.81 m/s^2[/tex] is the gravitational acceleration and [tex]h=1.0 m[/tex] is the height of the hill. Using these data, we have
[tex]U=(0.1 kg)(9.81 m/s^2)(1.0 m)=0.98 J[/tex]

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