TheSmartOne
  • TheSmartOne
If a car's mass is 600 kg, and its speed is 10 m/s. And a scooter's mass is 80 kg, and the scooter's speed is 50 m/s. Then which will require more force to stop it if the distance is the same?
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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TheSmartOne
  • TheSmartOne
@Michele_Laino :)
TheSmartOne
  • TheSmartOne
I thought we used f = ma And then f = 600 x 10 f = 6,000 And f = 80 x 50 f = 4,000 So it would take more force to stop the car. Am I correct? :P
Michele_Laino
  • Michele_Laino
the object which requires more force is the object which has the highest kinetic energy

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Michele_Laino
  • Michele_Laino
now the kinetic energy of the car is: 0.5 * 600*100=30,000 Joules whereas kinetic energy of scooter is: 0.5*80*2500=100,000 Joules
Michele_Laino
  • Michele_Laino
so it is the scooter
Michele_Laino
  • Michele_Laino
oops.. formula for kinetic energy is: \(KE=1/2 \cdot m \cdot v^2\)
TheSmartOne
  • TheSmartOne
oh thank you so much :D
TheSmartOne
  • TheSmartOne
@eta @waterineyes there is your answer :p

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