NEET Last 32 Years Solved 1988 – 2019 Physics and Chemistry Video Solutions
Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
A body of mass 1 kg of thrown upwards with a velocity 20 m/s. It momentarily comes to rest after attaining a height of 18m. How much energy is lost due to air friction ? (g=10m/s^2)
28
Aug
A body of mass 1 kg of thrown upwards with a velocity 20 m/s. It momentarily comes to rest after attaining a height of 18m. How much energy is lost due to air friction ? (g=10m/s^2) A body of mass 1 kg of thrown upwards with a velocity 20 m/s. It momentarily comes to rest [...]
A uniform force of (3i^+j^) newton acts on a particle of mass 2 kg. Hence the particle is displaced from position (2i^+k^) meter to position (4i^+3j^−k^) meter. The work done by the force on the particle is
28
Aug
A uniform force of (3i^+j^) newton acts on a particle of mass 2 kg. Hence the particle is displaced from position (2i^+k^) meter to position (4i^+3j^−k^) meter. The work done by the force on the particle is A particle moves from a point (-2i^ + 5j^) to (4j^ + 3k^ ) when a force of [...]
Two similar spring P and Q have spring constants KP and KQ, such that KP KQ. They are stretched, first by the same amount (case a), then by the same force (case b). The work done by the spring WP and WQ are related as, in case (a) and case (b), respectively:
28
Aug
Two similar spring P and Q have spring constants KP and KQ, such that KP KQ. They are stretched, first by the same amount (case a), then by the same force (case b). The work done by the spring WP and WQ are related as, in case (a) and case (b), respectively: first by [...]
A particle moves from a point (-2i^ + 5j^) to (4j^ + 3k^ ) when a force of (4i^+3j^) N is applied. How much work has been done by the force ?
28
Aug
A particle moves from a point (-2i^ + 5j^) to (4j^ + 3k^ ) when a force of (4i^+3j^) N is applied. How much work has been done by the force ? A particle moves from a point (-2i^ + 5j^) to (4j^ + 3k^ ) when a force of (4i^+3j^) N is applied. How [...]
Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m/s. Take ‘g’ constant with a value 10 m/s^2. The work done by the (i) gravitational force the (ii) resistive force of airs is:
28
Aug
Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m/s. Take ‘g’ constant with a value 10 m/s^2. The work done by the (i) gravitational force the (ii) resistive force of airs is: A particle of mass m [...]
Water falls from a height of 60 m at the rate 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy . How much power is generated to by the turbine? (g=10 m/s^(2)`.
28
Aug
Water falls from a height of 60 m at the rate 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy . How much power is generated to by the turbine? (g=10 m/s^(2)`. Water falls from a height of 60 m at the rate 15 kg/s to operate a [...]
An engine pumps water through a hose pipe . Water passes through the pipe and leave with a velocity 2m/s. The mass per unit length of water in pipe is 100 kg/m . What is the power of the engine ?
28
Aug
An engine pumps water through a hose pipe . Water passes through the pipe and leave with a velocity 2m/s. The mass per unit length of water in pipe is 100 kg/m . What is the power of the engine ? An engine pumps water through a hose pipe . Water passes through the pipe [...]
The heart of a man pumps 5 liters of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be 13.6 × 10^3 kg/m^3 and g = 10m/s^2, then the power of heart in watt is :
28
Aug
The heart of a man pumps 5 liters of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be 13.6 × 10^3 kg/m^3 and g = 10m/s^2, then the power of heart in watt is : The heart of a man pumps 5 liters of [...]
A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the force on the particle at time t is
28
Aug
A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the force on the particle at time t is A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest [...]
A body of mass 1 kg begins to move under the action of a time dependent force F = (2t i^ – 3t^2j^) N, where i^ and j^ are unit vectors along x and y axis. What power will be developed by the force at the time (t)?
28
Aug
A body of mass 1 kg begins to move under the action of a time dependent force F = (2t i^ – 3t^2j^) N, where i^ and j^ are unit vectors along x and y axis. What power will be developed by the force at the time (t)? A body of mass 1 kg begins [...]