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STATEMENT-1: If a car and truck hacve sa...

STATEMENT-1: If a car and truck hacve same momentum then the tr5uck has more kinetic energy
STATEMENT-2: If a car and truck have same kinetic energy then the truck has more momentum.
STATEMENT-3: If a car and truck have same kinetic energy then both have same momentum

A

T T F

B

F F T

C

F T F

D

T F T

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the statements regarding the car and truck, we will use the relationships between momentum and kinetic energy. ### Step 1: Understanding Momentum and Kinetic Energy - The momentum (p) of an object is given by the formula: \[ p = mv \] where \( m \) is the mass and \( v \) is the velocity of the object. - The kinetic energy (K.E.) of an object is given by the formula: \[ K.E. = \frac{1}{2} mv^2 \] ### Step 2: Analyzing Statement 1 **Statement 1:** If a car and truck have the same momentum, then the truck has more kinetic energy. - Given that both vehicles have the same momentum, we can express this as: \[ p_{car} = p_{truck} \implies m_{car}v_{car} = m_{truck}v_{truck} \] - Kinetic energy is inversely proportional to mass when momentum is constant. Since the truck has a greater mass than the car, it must have a lower velocity to maintain the same momentum. - Therefore, the kinetic energy of the truck will be less than that of the car, making this statement **false**. ### Step 3: Analyzing Statement 2 **Statement 2:** If a car and truck have the same kinetic energy, then the truck has more momentum. - If both vehicles have the same kinetic energy, we have: \[ K.E._{car} = K.E._{truck} \implies \frac{1}{2} m_{car} v_{car}^2 = \frac{1}{2} m_{truck} v_{truck}^2 \] - Rearranging gives us: \[ m_{car} v_{car}^2 = m_{truck} v_{truck}^2 \] - Since the truck has a greater mass, it must have a greater momentum to maintain the same kinetic energy. Thus, the momentum of the truck will be greater than that of the car, making this statement **true**. ### Step 4: Analyzing Statement 3 **Statement 3:** If a car and truck have the same kinetic energy, then both have the same momentum. - From the previous analysis, we established that if the kinetic energies are the same, the momentum of the truck (which has a larger mass) will be greater than that of the car. - Therefore, this statement is also **false**. ### Final Conclusion - Statement 1: False - Statement 2: True - Statement 3: False ### Summary of Results - The correct answers are: False, True, False.
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