A particle ( m =1 kg ) slides down a frictionless track ( AOC ) starting from rest at a point A (height 2 m ). After reaching C. the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m ), the kinetic energy of the particle (in J) is: (Figure drawn is schematic and not to scale; take g =10 ms -2

Question

A particle ( m =1 kg ) slides down a frictionless track ( AOC ) starting from rest at a point A (height 2 m ). After reaching C. the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m ), the kinetic energy of the particle (in J) is: (Figure drawn is schematic and not to scale; take g =10 ms -2 <img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/p-bu4jcrfkaudw8s97.jpg" /> (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

KE = PE 1- PE 2= mgh 1- mgh 2 =1 × 10 × 2-1 × 10 × 1=10 J

KE=PE1​−PE2​=mgh1​−mgh2​ =1×10×2−1×10×1=10J

$K E = P E_{1} - P E_{2} = m g h_{1} - m g h_{2}$
$= 1 \times 10 \times 2 - 1 \times 10 \times 1 = 10 J$