Chapter 6 – Work, Energy and Power

A body is allowed to fall freely under gravity from a height of 10m. If it looses 25% of its energy due to impact with the ground, then the maximum height it rises after one impact is ? A body is allowed to fall freely under gravity from a height of 10m. If it looses [...]

The potential energy of a 1kg particle free to move along the x- axis is given by V(x)=(x^4/4−x^2/2)J The total mechanical energy of the particle is 2J . Then , the maximum speed (in m/s) is the maximum speed (in m/s) is The potential energy of a 1kg particle free to move along the x- [...]

A particle in a certain conservative force field has a potential energy given by V=20xy/z. The force exerted on it is A particle in a certain conservative force field has a potential energy given by V=20xy/z. The force exerted on it is October 28, 2020 Category: Chapter 6 - Work, Energy and Power , MTG [...]

A rod of mass m and length l is made to stand at an angle of 60^o with the vertical. Potential energy of the rod in this position is A rod of mass m and length l is made to stand at an angle of 60^o with the vertical. Potential energy of the rod in [...]

The potential energy of a conservative system is given by V(x)=(x^2 −3x) joule. Then its equilibrium position is at The potential energy of a conservative system is given by V(x)=(x^2 −3x) joule. Then its equilibrium position is at October 28, 2020 Category: Chapter 6 - Work, Energy and Power , MTG NEET Physics , Part [...]

If two Spring A and B with spring constant 2K and k are stretched separately by the same suspended weight then the ratio between the work done in stretching A and B is If two Spring A and B with spring constant 2K and k are stretched separately by the same suspended weight then the [...]

A spring of spring constant 5×10^3N/m is stretched initially by 5 cm from the unstretched position. The work required to stretch it further by another 5 cm is . A spring of spring constant 5×10^3N/m is stretched initially by 5 cm from the unstretched position. The work required to stretch it further by another 5 [...]

A spring of force constant 800 N m^-1 has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is A spring of force constant 800 N m^-1 has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is October [...]

A spring, which is initially in its unstretched condition, is first stretched by a length x and then again by a further length x. The work done in the first case is W1 and in the second case is W2. Then A spring is first stretched by a length x and then again by a [...]

Two springs A and B are identical but A is harder than B(kA > kB). Let W A and WB ​ represent the work done when the springs are stretched through the same of the distance and WA’ and WB′ are the work done when these are stretched by equal forces then which of the [...]