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A man can swim at the rate of 5 km/h in still water. A river 1 km wide flows at the rate of 3 km/h^-1.
28
Aug
A man can swim at the rate of 5 km/h in still water. A river 1 km wide flows at the rate of 3 km/h^-1. A man can swim at the rate of 5 km//h in still water. A river 1 km wide flows at the rate of 3km h^(-1). August 28, 2020 Category: Uncategorised [...]
a cubical, wooden block has side a=30cm. it is floating in a rectangular tank partially filled with water and having base area A= 45cm x 60cm. calculate the work done to press the block slowely so that it is just immersed in water. (p block = 500kg m^-3 , p water = 1000kg m^-3)
28
Aug
a cubical, wooden block has side a=30cm. it is floating in a rectangular tank partially filled with water and having base area A= 45cm x 60cm. calculate the work done to press the block slowely so that it is just immersed in water. (p block = 500kg m^-3 , p water = 1000kg m^-3) a [...]
An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water :
28
Aug
An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water : A body of mass 3 kg is under a constant force which causes a [...]
A man wishes to cross the river in a boat. If he crosses the river in minimum time, then he takes 10min with a drift of 120m. If he crosses the river taking shortest root he takes 12.5min. The velocity of boat with respect to water is?
28
Aug
A man wishes to cross the river in a boat. If he crosses the river in minimum time, then he takes 10min with a drift of 120m. If he crosses the river taking shortest root he takes 12.5min. The velocity of boat with respect to water is? A man wishes to cross the river in [...]
A block of mass 10 kg is moving in x-direction with a constant speed of 10 m/s. It is subjected to a retarding force F = 0.1 x J/m during its travel from x=20m to x=30cm. Its final kinetic energy will be
28
Aug
A block of mass 10 kg is moving in x-direction with a constant speed of 10 m/s. It is subjected to a retarding force F = 0.1 x J/m during its travel from x=20m to x=30cm. Its final kinetic energy will be A body of mass 3 kg is under a constant force which causes [...]
A truck is moving with a constant velocity of 54 km/h^-1. In which direction (angle with the direction of motion of truck) should a stone be projected up with a velocity of 20 m/s^-1, from the floor of the truck of the truck, so as to appear at right angles to the truck, for a person standing on earth ?
28
Aug
A truck is moving with a constant velocity of 54 km/h^-1. In which direction (angle with the direction of motion of truck) should a stone be projected up with a velocity of 20 m/s^-1, from the floor of the truck of the truck, so as to appear at right angles to the truck, for a [...]
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A truck is moving with a constant velocity of 54 km h^-1. In which direction (angle with the direction of motion of truck) should a stone be projected up with a velocity of 20 ms^-1 ,
for a person standing on earth ? ,
from the floor of the truck of the truck ,
so as to appear at right angles to the truck ,
A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tangential acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to 8×10^−4 J boy the end of the second revolution after the beginning of the motion?
28
Aug
A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tangential acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to 8×10^−4 J boy the end of the second revolution after the beginning of the motion? A Force F=20+10 y [...]
A bird is flying due east with a velocity of 4 m s^-1. The starts to blow with a velocity of 3 ms^-1 due north. What is the magnitude of relative velocity of bird w.r.t. wind ? Find out its direction also.
28
Aug
A bird is flying due east with a velocity of 4 m s^-1. The starts to blow with a velocity of 3 ms^-1 due north. What is the magnitude of relative velocity of bird w.r.t. wind ? Find out its direction also. A block slips along an incline of a wedge. Due to the reaction [...]
A force F acting on an object varies with distance x as shown in the figure. The force is in N and x in m. The work done by the force in moving the object from x=0 to x=6 m is:
28
Aug
A force F acting on an object varies with distance x as shown in the figure. The force is in N and x in m. The work done by the force in moving the object from x=0 to x=6 m is: A force F acting on an object varies with distance x as shown in [...]
A body of mass 3 kg is under a constant force which causes a displacement s in metres in it,given by the relation s=1/3t^2 , where t is in seconds. Work done by the force in 2 seconds is:-
28
Aug
A body of mass 3 kg is under a constant force which causes a displacement s in metres in it,given by the relation s=1/3t^2 , where t is in seconds. Work done by the force in 2 seconds is:- A body of mass 3 kg is under a constant force which causes a displacement s [...]