Q98 / 150 · JEE Main 2006 · Physics

A particle of mass $100 \mathrm{~g}$ is thrown vertically upwards with a speed of $5 \mathrm{~m} / \mathrm{s}$. the work done by the force of gravity during the time the particle goes up is

  • A
    $0.5 \mathrm{~J}$
  • B
    $-0.5 \mathrm{~J}$
  • Correct answer
    C
    $-1.25 \mathrm{~J}$
  • D
    $1.25 \mathrm{~J}$

Solution

$-m g h=-m g\left(\frac{v^2}{2 g}\right)=-1.25 \mathrm{~J}$

Hence, the correct answer is option: 'C'.

Relevant Questions