Questions asked
The population size of a bird increased from 600 to 645 in one year. If the per capita birth rate of this population is 0.125 what is its per capita death rate ?
Kamlesh Goyal
Numerade educator
"A horizontal force of 5 N is required to maintain a velocity of 2 m/s for a block of 10 kg mass sliding over a rough surface. The work done by this force in one minute is (a) 600 J (b) 60 J (c) 6 J (d) 6000 J"
"A box of mass 1 kg is pulled on a horizontal plane of length 1 m by a force of 8 N then it is raised vertically to a height of 2m, the net work done is (a) 28 J (b) 8 J (c) 18 J (d) None of above"
"A body of mass 5 kg is placed at the origin, and can move only on the x-axis. A force of 10 N is acting on it in a direction making an angle of 60 o with the x-axis and displaces it along the xaxis by 4 metres. The work done by the force is"
"A body of mass 2kg is moving in a vertical circle of radius 2m . The work done when it moves from the lowest point to the highest point is"
A body of mass m is tied to one end of a string of length l and revolves vertically in a circular path. At the lowest point of circle, what must be the K.E. of the body so as to complete the circle [RPMT 1996] (a) 5 mgl (b) 4 mgl (c) 2.5 mgl (d) 2 mgl
"A body of mass of 100g is attached to a 1m long string and it is revolving in a vertical circle. When the string makes an angle of 60o with the vertical then its speed is 2 m /s . The tension in the string at 60o will be"
"With what angular velocity should a 20 m long cord be rotated such that tension in it, while reaching the highest point, is zero"
A mass of 2kg is tied to the end of a string of length 1m. It is, then, whirled in a vertical circle with a constant speed of 5 ms-1. Given that g = 10 ms-2. At which of the following locations of tension in the string will be 70 N
"If the momentum of a body is increased by 100 %, then the percentage increase in the kinetic energy is"