Two boys A and B are standing at two positions on a staircase. B has a 500 g ball in his hand which is 50 cm higher than the platform he is on. Each step is 20 cm high and 20 cm wide.B drops the ball from his hand down the stairs and A stops the ball on the second step. Find the change in potential energy of the ball. Consider g =10 m s−2 and assume that there is no loss of energy when the ball rolls down the staircase.

Two boys A and B are standing at two positions on a staircase. B has a

1.	Two boys A and B are standing at two positions on a staircase. B has a 500 g ball in his hand which is 50 cm higher than the platform he is on. Each step is 20 cm high and 20 cm wide.B drops the ball from his hand down the stairs and A stops the ball on the second step. Find the change in potential energy of the ball. Consider g =10 m s−2 and assume that there is no loss of energy when the ball rolls down the staircase.
Answer» Two boys $A$ and $B$ are standing at two positions on a staircase. $B$ has a $500 g$ ball in his hand which is $50 cm$ higher than the platform he is on. Each step is $20 cm$ high and $20 cm$ wide. $B$ drops the ball from his hand down the stairs and $A$ stops the ball on the second step. Find the change in potential energy of the ball. Consider $g$ $= 10 {m s}^{- 2}$ and assume that there is no loss of energy when the ball rolls down the staircase.

Discussion

No Comment Found

Related InterviewSolutions

Question 24How does the force of attraction between the two bodies depend upon their masses and distance between them? A student thought that two bricks tied together would fall faster than a single one under the action of gravity. Do you agree with his hypothesis or not? Comment.
Question 7 (c) A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate: (c) the force of wagon 1 on wagon 2.
If the linear density of a rod of length L varies as λ = kx where k is a constant and x is the distance of any point from one endplaced at origin. The distance of centre of mass from x = 0 is
A body sinks when immersed in kerosene. What relation can be established between the density of body and kerosene?
If a person drops a pebble in a well of 100 m depth, after how much time (in seconds) will he be able to hear the sound?Given:Acceleration due to gravity, g=10 ms−2Speed of sound in air, v=343 ms−1
The current supplied by the battery in the circuit shown in figure is
The device which use Pascal law is
Time period of a sound wave is defined as:
If the density of the water is equal to the density of ship then does it sink or float?
A magnet of length L and magnetic moment M is made into two halves A and B, perpendicular to its axis. One piece A is bent into a semicircle of radius R and is joined to the other piece at the poles as shown in the figure below. Assuming that the magnet is in the form of a thin wire initially .Find the magnetic moment of the resulting magnet.

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment