A bicycle and a car are both traveling at a rate of 5 m/s. Which statement is true?

Question

A bicycle and a car are both traveling at a rate of 5 m/s. Which statement is true??  
A. The bicycle has more kinetic energy than the car.  
B. The bicycle has less kinetic energy than the car.  
C. Both vehicles have the same amount of kinetic energy.  
D. Only the car has kinetic energy.

Accepted Answer

Correct Answer: (B)The bicycle has less kinetic energy than the car.. 
Rationale: The car possesses substantially greater kinetic energy than the bicycle.This is because despite both traveling at 5 m/s, kinetic energy scales linearly with mass when velocity is identical. With the car's mass typically exceeding the bicycle's by two orders of magnitude, its kinetic energy proportionally exceeds the bicycle's even at matching speeds.A) The bicycle has more kinetic energy than the car. This contradicts the kinetic energy equation since the bicycle's mass is substantially smaller than the car's while velocities match. With velocity identical (5 m/s) for both, KE becomes proportional solely to mass. A typical bicycle (≈10 kg) cannot possess greater kinetic energy than a typical car (≈1,500 kg) at equal speeds.B) The bicycle has less kinetic energy than the car. Kinetic energy scales linearly with mass when velocity is constant. Both vehicles travel at 5 m/s, but the car's mass (typically 1,000–2,000 kg) vastly exceeds the bicycle's mass (typically 10–20 kg). Therefore, the car possesses proportionally greater kinetic energy, often 100 times more, despite identical velocities.C) Both vehicles have the same amount of kinetic energy. Equal kinetic energy would require either identical masses (impossible for bicycle vs. car) or compensating velocity differences (not present here). Since KE = ½mv² and v is identical while m differs dramatically, their kinetic energies cannot be equal. This option ignores the mass dependence inherent in the kinetic energy formula.D) Only the car has kinetic energy. Any object with non-zero mass moving at non-zero velocity possesses kinetic energy. The bicycle's motion at 5 m/s guarantees it has kinetic energy, albeit substantially less than the car's. This option incorrectly suggests a velocity threshold below which kinetic energy vanishes, contradicting fundamental physics principles.Conclusion Kinetic energy depends on both mass and velocity squared, making mass a critical determinant when velocities match. A car traveling at the same speed as a bicycle possesses substantially greater kinetic energy due to its larger mass, a principle with profound implications for vehicle safety, collision dynamics, and energy transfer in mechanical systems.

A bicycle and a car are both traveling at a rate of 5 m/s. Which statement is true?

A
The bicycle has more kinetic energy than the car.

B
The bicycle has less kinetic energy than the car.

C
Both vehicles have the same amount of kinetic energy.

D
Only the car has kinetic energy.

The car possesses substantially greater kinetic energy than the bicycle.

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A bicycle and a car are both traveling at a rate of 5 m/s. Which statement is true?

A The bicycle has more kinetic energy than the car. B The bicycle has less kinetic energy than the car. C Both vehicles have the same amount of kinetic energy. D Only the car has kinetic energy.

The car possesses substantially greater kinetic energy than the bicycle.

Topic Flashcards

Mini Quiz

Related Questions

A
The bicycle has more kinetic energy than the car.

B
The bicycle has less kinetic energy than the car.

C
Both vehicles have the same amount of kinetic energy.

D
Only the car has kinetic energy.