A shooter fires a bullet with a speed of 
can just penetrate 3 planks of equal thickness x. Then the number of such planks penetrated by this bullet if its velocity becomes 3 times initial. (consider retardation is constant)
Text Solution
Verified by ExpertsThe correct answer is:
C
By work-energy theorem,
Now, again by work-energy theorem,
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A spring 40 mm long is stretched by the application of a force. If 10 N force required to stretch t…
A coconut of mass m falls from the tree through a vertical distance of s and could reach ground wit…
A block of mass M is kept on a platform which is accelerating upward with a constant acceleration a…
Figure shows a particle sliding on a frictionless track which terminates in a straight horizontal s…
A bullet of mass 20 g is found to pass two points 30 m apart in a time interval of 4 second. Calcul…
In a ballistics demonstration, a police officer fires a bullet of mass 50.0 g with speed 200 m s –1…