Chapter 7 – Work, Energy and Power
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The potential energy of a system increases, if work is done
28
Aug
The potential energy of a system increases, if work is done if work is done The potential energy of a system increases August 28, 2020 Category: Chapter 7 - Work, Energy and Power , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
The potential energy of a particle in a force field is: U =A/r^2 − B/r where A and B are positive constants and r is the distance of particle from the centre of field. For stable equilibrium, the distance of the particle is :
28
Aug
The potential energy of a particle in a force field is: U =A/r^2 − B/r where A and B are positive constants and r is the distance of particle from the centre of field. For stable equilibrium, the distance of the particle is : the distance of the particle is : The potential energy of [...]
A body of mass m is taken from earth’s surface to the height equal to twice the radius of earth, the change in potential energy of body will be
28
Aug
A body of mass m is taken from earth’s surface to the height equal to twice the radius of earth, the change in potential energy of body will be A body of mass m is taken from earth's surface to the height equal to twice the radius of earth the change in potential energy of [...]
A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The velocity of the shell is
28
Aug
A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The velocity of the shell is A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The [...]
A position dependent force F= 7 − 2x + 3x^2 newton (where x is in meter) on a small body of mass 2 Kg & displace it from x = 0 to x = 5 m. Work done in joule is
24
Aug
A position dependent force F= 7 − 2x + 3x^2 newton (where x is in meter) on a small body of mass 2 Kg & displace it from x = 0 to x = 5 m. Work done in joule is A position dependent force F= 7 − 2x + 3x^2 newton (where x is [...]
A force acts on a 3 g particle in such a way that the position of the particle as a function of time is given by x = 3t − 4^t2 + t^3, where x is in meters and t is in seconds. The work done during the first 4 second is :
24
Aug
A force acts on a 3 g particle in such a way that the position of the particle as a function of time is given by x = 3t − 4^t2 + t^3, where x is in meters and t is in seconds. The work done during the first 4 second is : A force [...]
A bullet of mass 10 g leaves a rifle at an initial velocity of 1000 m/s and strikes the earth at the same level with a velocity of 500 m/s. the work done in joules overcoming the resistance of air will be
24
Aug
A bullet of mass 10 g leaves a rifle at an initial velocity of 1000 m/s and strikes the earth at the same level with a velocity of 500 m/s. the work done in joules overcoming the resistance of air will be Two masses of 1 g and 9 g are moving with equal kinetic [...]
How much water a pump of 2 kW can raise in one minute to a height of 10 m
24
Aug
How much water a pump of 2 kW can raise in one minute to a height of 10 m How much water a pump of 2 kW can raise in one minute to a height of 10 m August 24, 2020 Category: Chapter 7 - Work, Energy and Power , NEET Last 32 Years Solved [...]
Two masses of 1 g and 9 g are moving with equal kinetic energies. The ratio of the magnitudes of their respective linear momentum is
24
Aug
Two masses of 1 g and 9 g are moving with equal kinetic energies. The ratio of the magnitudes of their respective linear momentum is Two masses of 1 g and 9 g are moving with equal kinetic energies. The ratio of the magnitudes of their respective linear momentum is August 24, 2020 Category: Chapter [...]
The kinetic energy acquired by a mass m travelling distance d, starting from rest, under the action of a constant force is directly proportional to:
24
Aug
The kinetic energy acquired by a mass m travelling distance d, starting from rest, under the action of a constant force is directly proportional to: starting from rest The kinetic energy acquired by a mass m travelling distance d under the action of a constant force is directly proportional to: August 24, 2020 Category: Chapter [...]