Concept explainers
A van exerts a force on trailers of different masses m. All velocities v are constant. Compared with the force exerted on the trailer, rank the magnitude of force the trailer exerts on the van. Or are all pairs of forces equal in magnitude?
The rank of the magnitude of force the trailer exerts on the van.
Answer to Problem 22A
The rank of the magnitude of force the trailer exerts on the van is A=B=C.
Explanation of Solution
Introduction:
The expression for Newton’s second law of acceleration as follows:
Here,
Consider the acceleration due to gravity as
If the object is moving with a constant velocity, then the acceleration of the object will be zero.
Hence, the net force exerted by the van on the trailer is zero due to the constant velocity.
Hence, the force exerted by the van on each trailer is same. That is
Hence, the force exerted by each trailer on the van is also same and opposite in direction. That is
Hence, the rank of the magnitude of force the trailer exerts on the van is A=B=C.
Conclusion:
Thus, the rank of the magnitude of force the trailer exerts on the van is A=B=C.
Chapter 7 Solutions
Conceptual Physics: The High School Physics Program
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