a.
The change in momentum of the car if a constant external force changes its speed from
a.
Answer to Problem 88A
Explanation of Solution
Given:
The mass of the car,
Initial velocity of the car,
Final velocity of the car,
Time taken,
Formula used:
Momentum of an object of mass m and moving with velocity v is given by,
Calculation:
Using the given values in above formula, the change in momentum will be
Conclusion:
Thus, the change in momentum of the car is
b.
The magnitude of the external constant force applied to the car.
b.
Answer to Problem 88A
Explanation of Solution
The mass of the car,
Initial velocity of the car,
Final velocity of the car,
Time taken,
From part (a), the change in momentum of the car,
Formula used:
Momentum of an object of mass m and moving with velocity v is given by,
Impulse on an object is equal to the change in momentum of an object,
Where
Calculation:
Then, using the given and calculated values in above formula, the magnitude of the external force will be,
Conclusion:
Thus, the magnitude of the external, constant force applied on the car is
Chapter 9 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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