Search any question & find its solution
Question:
Answered & Verified by Expert
A parachutist with total weight $75 \mathrm{~kg}$ drops vertically onto a sandy ground with a speed of $2 \mathrm{~ms}^{-1}$ and comes to a halt over a distance of $0.25 \mathrm{~m}$. The average force from the ground on her is close to.
Options:
Solution:
1458 Upvotes
Verified Answer
The correct answer is:
$1350 \mathrm{~N}$
$0^{2}=2^{2}-2 \mathrm{a} \frac{1}{4}$
$\mathrm{a}=8 \mathrm{~m} / \mathrm{s}^{2}$
$\mathrm{a}_{\mathrm{T}}=10+8=18 \mathrm{~m} / \mathrm{s}^{2}$
$\mathrm{f}=\mathrm{ma}$
$\quad=75 \times 18$
$=1350 \mathrm{~N}$
$\mathrm{a}=8 \mathrm{~m} / \mathrm{s}^{2}$
$\mathrm{a}_{\mathrm{T}}=10+8=18 \mathrm{~m} / \mathrm{s}^{2}$
$\mathrm{f}=\mathrm{ma}$
$\quad=75 \times 18$
$=1350 \mathrm{~N}$
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.