
Concept explainers
(a)
The maximum height made by the locust at its jump.
(a)

Answer to Problem 101P
Maximum height is
Explanation of Solution
The jump of locust is a projectile motion.
The angle of jump is
At maximum height, the vertical component of velocity is zero. Write the expression for vertical component of velocity at the highest point of motion.
Here, the vertical component of velocity at the highest point is
Rewrite the above relation in terms of
Write the equation for horizontal distance covered by locust in time
Here, the horizontal distance covered by locust in time
Rewrite the above relation in terms of
Equate the right hand sides of equation (I) and (II).
Rewrite the above relation in terms of
Write the expression for the maximum height of a projectile.
Here, the maximum height is
Rewrite the above relation for
Conclusion:
Substitute
Therefore, the maximum height is
(b)
Check whether the maximum height would be smaller or larger if the locust jumps with the same initial speed at
(b)

Answer to Problem 101P
Maximum height would be smaller than that of in
Explanation of Solution
The jump of locust is a projectile motion.
The angle of jump is
Write the final equation for
From the above equation can be seen that
Conclusion:
Therefore, the maximum height would be smaller than that of in
(c)
Check whether the horizontal range of locust would be smaller or larger if the locust jumps with the same initial speed at
(c)

Answer to Problem 101P
Horizontal range would be larger than that at
Explanation of Solution
The jump of locust is a projectile motion.
The angle of jump is
Write the equation for the horizontal range of a projectile.
Here, the horizontal rage of projectile is
From the above equation can be seen that
Conclusion:
Substitute
Substitute
It is found that
Therefore, the horizontal range would be larger than that at
(d)
The maximum horizontal rage and height achieved by locust at
(d)

Answer to Problem 101P
Maximum horizontal range is
Maximum height is
Explanation of Solution
The jump of locust is a projectile motion.
Conclusion:
Substitute
Substitute
Substitute
Therefore, the Maximum horizontal range is
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Chapter 3 Solutions
Physics
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