Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.Conservative force & potential energyMedium2 minPYQ_2020

PhysicsMediumsingle choice

A body is projected at an angle of $60 °$ with the horizontal. If its kinetic energy at its maximum height is $10 J$ , then the height at which its potential energy and kinetic energy have equal values is (consider potential energy at the point of projection to be zero)

Options:

Answer:

Solution:

KE at maximum height

$\frac{1}{2} {mu}^{2} {cos}^{2} 6 0^{\circ} = 10 J$

$\frac{1}{2} {mu}^{2} = 40 J$

$Mg H_{max} = 30 J$ ...(i)

When $PE = KE$

$\Rightarrow mgh = 20 =$ ...(ii)

from (i) and (ii)

$\frac{h}{H_{max}} = \frac{2}{3}$

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Conservative force & potential energy

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...