Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JIPMER 2018
Exam
JIPMER
Year
2018
Subject
Physics
Chapter
Laws of Motion

JIPMER 2018 · Physics · Laws of Motion

A force of 10 N acts on a body of mass 0.5 kg for 0.25 s starting...

A force of 10 N acts on a body of mass 0.5 kg for 0.25 s starting from rest. What is its momentum now?

Options

  1. A0.25 N/s0.25 \mathrm{~N} / \mathrm{s}
  2. B2.5 N/s2.5 \mathrm{~N} / \mathrm{s}
  3. C0.5 N/s0.5 \mathrm{~N} / \mathrm{s}
  4. D0.75 N/s0.75 \mathrm{~N} / \mathrm{s}

Correct answer

B. 2.5 N/s2.5 \mathrm{~N} / \mathrm{s}

Step-by-step solution

Given, F=10 N,vi=0, m=0.5 kg,Δt=0.25 s∵\mathrm{F}=10 \mathrm{~N}, \mathrm{v}_{\mathrm{i}}=0, \mathrm{~m}=0.5 \mathrm{~kg}, \Delta \mathrm{t}=0.25 \mathrm{~s} \because Change in momentum, Δ\Delta\mathrm{p}=\mathrm{p}f−pf_{\mathrm{f}}-\mathrm{p}_{\mathrm{f}}∵Δp=F⋅ΔtF⋅Δt=pf−pi\begin{aligned} \because & \Delta \mathrm{p} & =\mathrm{F} \cdot \Delta \mathrm{t} \\ & & \mathrm{F} \cdot \Delta \mathrm{t}=\mathrm{p}_{\mathrm{f}}-\mathrm{p}_{\mathrm{i}}\end{aligned} or 10×0.25=pf−mvi=pf−0.5×0 or pf=2.5 N/s\begin{aligned} \text{ or } & & 10 \times 0.25 & =\mathrm{p}_{\mathrm{f}}-\mathrm{mv}_{\mathrm{i}}=\mathrm{p}_{\mathrm{f}}-0.5 \times 0 \\ \text{ or } & & \mathrm{p}_{\mathrm{f}} & =2.5 \mathrm{~N} / \mathrm{s}\end{aligned}$$
Practice Laws of Motion on Quantrex Academy →

More from Laws of Motion

The magnitude and direction of the acceleration produced in a body of mass 5 kg when two… NEET 2026A box of mass 15 kg is kept on the floor of a stationary trolley. The coefficient of… NEET 2026A car travels on a circular racetrack of radius 50 m, which is banked at an angle θ . If… NEET 2026There are two inclined surface of equal length (L) and same angle of inclination 45^ ∘… NEET 2025A uniform rod of mass 20 kg and length 5 m leans against a smooth vertical wall making an… NEET 2025A box of mass 5 kg is pulled by a cord, up along a frictionless plane inclined at 30^ ∘… NEET 2024A bob is whirled in a horizontal circle by means of a string at an initial speed of 10… NEET 2024A horizontal force 10 N is applied to a block A as shown in figure. The mass of blocks A… NEET 2024 Full Laws of Motion list All JIPMER PYQs