Chapter 8 – Work, Energy and Power
Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 1 > Chapter 8 - Work, Energy and Power
The potential energy of a certain spring when stretched through a distance ‘S’ is 10 joule. The amount of work (in joule) that must be done on this spring to stretch it through an additional distance ‘S’ will be
21
Oct
The potential energy of a certain spring when stretched through a distance ‘S’ is 10 joule. The amount of work (in joule) that must be done on this spring to stretch it through an additional distance ‘S’ will be Work done from d = 0 m to d = 3 m October 21, 2020 Category: [...]
When a spring is stretched by 2 cm, it stores 100 J of energy. If it is further stretched by 2 cm, the stored energy will be increased by
21
Oct
When a spring is stretched by 2 cm, it stores 100 J of energy. If it is further stretched by 2 cm, the stored energy will be increased by it stores 100 J of energy. If it is further stretched by 2 cm the stored energy will be increased by When a spring is stretched [...]
If the kinetic energy of body is directly proportional to time t, the magnitude of force acting on the body is (i) directly proportional to t√ (ii) inversely proportional to t√ (iii) directly proportional to the speed of the body. (iv) inversely proportional to the speed of the body.
21
Oct
If the kinetic energy of body is directly proportional to time t, the magnitude of force acting on the body is (i) directly proportional to t√ (ii) inversely proportional to t√ (iii) directly proportional to the speed of the body. (iv) inversely proportional to the speed of the body. If the kinetic energy of body [...]
The kinetic energy acquired by a body of mass m in travelling a certain distance starting from rest, under a constant force is:
21
Oct
The kinetic energy acquired by a body of mass m in travelling a certain distance starting from rest, under a constant force is: The kinetic energy acquired by a body of mass m in travelling a certain distance starting from rest under a constant force is: October 21, 2020 Category: Cengage NEET by C.P Singh [...]
If the force acting on a body is inversely proportional to its speed, the kinetic energy of the body is
21
Oct
If the force acting on a body is inversely proportional to its speed, the kinetic energy of the body is If the force acting on a body is inversely proportional to its speed the kinetic energy of the body is October 21, 2020 Category: Cengage NEET by C.P Singh , Chapter 8 - Work, Energy [...]
A force acting on particle is given by F = (3x^2i + 4yj])N. The change in kinetic energy of particle as it moves from (0,2m) to (1m, 3m) is a
21
Oct
A force acting on particle is given by F = (3x^2i + 4yj])N. The change in kinetic energy of particle as it moves from (0,2m) to (1m, 3m) is a 2m) to (1m 3m) is a A force acting on particle is given by F = (3x^2i + 4yj])N. The change in kinetic energy of [...]
Two blocks A and B have masses m and 4m, respectively. Each one is acted upon by a force F. If they acquire the same kinetic energy in time tA and tB, then (tA)/(tB) is
21
Oct
Two blocks A and B have masses m and 4m, respectively. Each one is acted upon by a force F. If they acquire the same kinetic energy in time tA and tB, then (tA)/(tB) is respectively. Each one is acted upon by a force F. If they acquire the same kinetic energy in time tA [...]
A block of mass 2 kg is resting on a smooth surface. At what angle a force of 10 N be acting on the block so that it will acquire a kinetic energy of 10 J after moving 2 m
21
Oct
A block of mass 2 kg is resting on a smooth surface. At what angle a force of 10 N be acting on the block so that it will acquire a kinetic energy of 10 J after moving 2 m A block of mass 2 kg is resting on a smooth surface. At what angle [...]
A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at x=0, its velocity at x=12m is
21
Oct
A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at x=0, its velocity at x=12m is A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts [...]
A block of mass m at rest is acted upon by a force F for a time t. The kinetic energy of block after time t is
21
Oct
A block of mass m at rest is acted upon by a force F for a time t. The kinetic energy of block after time t is A block of mass m at rest is acted upon by a force F for a time t. The kinetic energy of block after time t is October [...]