
Concept explainers
(a)
Boulder will land on the road or beyond if

Answer to Problem 13.173P
The horizontal distance travelled by the rock is
Explanation of Solution
Given information:
Rock A falls from a distance of
The total linear momentum of two particles is conserved. Therefore
The co-efficient of restitution is defined as
For a uniformly accelerated motion
In above equation
Calculation:
Assume
Apply conservation of linear momentum in direction t.
Substitute
Apply co-efficient of restitution equation in direction n.
Substitute
Velocity
Velocity in y direction
Assume t as the time that takes for the rod to reach the ground.
Substitute
Solve
Find the horizontal distance
Substitute
Conclusion:
The horizontal distance travelled by the rock is
(b)
Boulder will land on the road or beyond if

Answer to Problem 13.173P
The horizontal distance travelled by the rock is
Explanation of Solution
Given information:
Rock A falls from a distance of
The total linear momentum of two particles is conserved. Therefore
The co-efficient of restitution is defined as
For a uniformly accelerated motion
In above equation
Calculation:
Assume
Apply conservation of linear momentum in direction t.
Substitute
Apply co-efficient of restitution equation in direction n.
Substitute
Velocity
Velocity in y direction
Assume t as the time that takes for the rod to reach the ground.
Substitute
Solve
Find the horizontal distance
Substitute
Conclusion:
The horizontal distance travelled by the rock is
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Chapter 13 Solutions
Vector Mechanics for Engineers: Dynamics
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