Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A bullet moving with a velocity of 100 m/s can just penetrate two planks of equal thickness. The number of such planks penetrated by the same bullet, when the velocity is doubled, will be –
Text Solution
Verified by ExpertsThe correct answer is:
C
Let the thickness of each plank = x then from third equation of motion,
0 = u 2 – 2a (2x)
u 2 = 4ax ...(i)
If velocity is doubled, let n planks are required
then,
0 = (2u) 2 – 2a(hx)
n = 
= 
= 8
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 vessel containing water is given a constant acceleration a towards the right, along a straight ho…
A ship of mass \(3 \times 10^{7} \, \text{kg}\) initially at rest is pulled by a force of \(5 \time…
The mass of a body measured by a physical balance in a lift at rest is found to be m. If the lift i…
Three weights W, 2W and 3W are connected to identical springs suspended from a rigid horizontal rod…
When forces F_1, F_2, F_3 are acting on a particle of mass m such that F_2 and F_3 are mutually per…
The spring balance A reads 2 kg with a block m suspended from it. A balance B reads 5 kg when a bea…