Physics

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 : 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 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 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 [...]

A bus is moving on a straight road towards north with a uniform speed of 50 km/hour turns through 90 degree. If the speed remains unchanged after turning, the increase in the velocity of bus in the turning process is A bus is moving on a straight road towards north with a uniform speed of [...]

A bullet is fired with a speed of 1000 m/sec in order to penetrate a target situated at 100 m away. If g=10m/s^2, the gun should be aimed A bullet is fired with a speed of 1000 m/sec in order to penetrate a target situated at 100 m away. If g=10m/s^2 the gun should be [...]

A stationary particle explodes into two particles of masses m1​ and m2​ which move in opposite direction with velocities v1​ and v2​. The ratio of their kinetic energies E1​/E2​ is A stationary particle explodes into two particles of masses m1​ and m2​ which move in opposite direction with velocities v1​ and v2​. The ratio of [...]

A man weighs 80kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5m/s^2. What would be the reading on the scale A man weighs 80kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5m/s^2. What [...]

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: 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 [...]