Cengage NEET by C.P Singh
A small sphere of mass m is dropped from a great height. After it has fallen 100 m it has attained its terminal velocity and continues to fall at that speed. The work done by air friction against the sphere during the first 100 m of fall is-
16
Sep
A small sphere of mass m is dropped from a great height. After it has fallen 100 m it has attained its terminal velocity and continues to fall at that speed. The work done by air friction against the sphere during the first 100 m of fall is- A square plate of 0.1 m side [...]
If the terminal speed of a sphere of gold (density =19.5kg/m^3) is 0.2m/s in a viscous liquid (density =1.5kg/m^3), find the terminal speed of a sphere of silver (density =10.5kg/m^3) of the same size in the same liquid
16
Sep
If the terminal speed of a sphere of gold (density =19.5kg/m^3) is 0.2m/s in a viscous liquid (density =1.5kg/m^3), find the terminal speed of a sphere of silver (density =10.5kg/m^3) of the same size in the same liquid find the terminal speed of a sphere of silver (density =10.5kg/m^3) of the same size in the [...]
A ball of radius r and density p falls freely under gravity through a distance h before entering water. Velocity of ball does not change even on entering water. If viscosity of water is n, the value of h is given by.
16
Sep
A ball of radius r and density p falls freely under gravity through a distance h before entering water. Velocity of ball does not change even on entering water. If viscosity of water is n, the value of h is given by. A ball of radius r and density p falls freely under gravity through [...]
A spherical ball is dropped in a long column of viscous liquid. The speed of the ball as a function of time may be best represented by the graph
16
Sep
A spherical ball is dropped in a long column of viscous liquid. The speed of the ball as a function of time may be best represented by the graph A spherical ball is dropped in a long column of viscous liquid. The speed of the ball as a function of time may be best represented [...]
A square plate of 0.1 m side moves parallel to a second plate with a velocity of `0.1 m/s`, both plates being immersed in water. If the viscous force is 0.002 N and the coefficient of viscosity is 0.01 poise , distance between the plates in m is
16
Sep
A square plate of 0.1 m side moves parallel to a second plate with a velocity of `0.1 m/s`, both plates being immersed in water. If the viscous force is 0.002 N and the coefficient of viscosity is 0.01 poise , distance between the plates in m is A square plate of 0.1 m side [...]
A mass m is vertically suspended from a spring of negligible mass, the system oscillates with a frequency n. what will be the frequency of the system, if a mass 4 m is suspended from the same spring?
16
Sep
A mass m is vertically suspended from a spring of negligible mass, the system oscillates with a frequency n. what will be the frequency of the system, if a mass 4 m is suspended from the same spring? A mass m is vertically suspended from a spring of negligible mass if a mass 4 m [...]
A mass is suspended separately by two springs of spring constant k1 and k2 in successive order. The time periods of oscillations in the two cases are T1 and T2 respectively. If the same mass be suspended by connecting the two springs in parallel (as shown in figure) then the time period of oscillations is T. The correct relation is
16
Sep
A mass is suspended separately by two springs of spring constant k1 and k2 in successive order. The time periods of oscillations in the two cases are T1 and T2 respectively. If the same mass be suspended by connecting the two springs in parallel (as shown in figure) then the time period of oscillations is [...]
A man can swim with velocity v relative to water.He has to cross a river of width d flowing with a velocity u(u>v). The distance traveled by man along the flow is x, when he reaches to opposite bank. For x to be minimum the person should swim at an angle alpha with the direction of the flow of water, where alpha is
16
Sep
A man can swim with velocity v relative to water.He has to cross a river of width d flowing with a velocity u(u>v). The distance traveled by man along the flow is x, when he reaches to opposite bank. For x to be minimum the person should swim at an angle alpha with the direction [...]
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A man can swim with velocity v relative to water.He has to cross a river of width d flowing with a velocity u(u>v). The distance traveled by man along the flow is x ,
when he reaches to opposite bank. For x to be minimum the person should swim at an angle alpha with the direction of the flow of water ,
where alpha is ,
A river is flowing from west to east at a speed of 5 metre per minute. A man on the south bank of the river , capable of swimming at 10 metre per minute, in still water , wants to swim across the river in the shortest time . He should swim
16
Sep
A river is flowing from west to east at a speed of 5 metre per minute. A man on the south bank of the river , capable of swimming at 10 metre per minute, in still water , wants to swim across the river in the shortest time . He should swim A river is [...]
A river is flowing from west to east with a speed of 5m/min. A man can swim in still water with a velocity 10m/min. In which direction should the man swim so as to take the shortest possible path to go to the south.
16
Sep
A river is flowing from west to east with a speed of 5m/min. A man can swim in still water with a velocity 10m/min. In which direction should the man swim so as to take the shortest possible path to go to the south. A particle is projected at an angle with horizontal. If T [...]