The motor provides energy at the rate of 7500 Joules each second.
The energy needed to raise the piano = mass of the piano x acceleration due to gravity x height = 500 x 9.81 x 1000 = 4.905 x 106 Joules
time taken = 4.905 x 106 / 7500 = 654 seconds
So, it would take around 11 minutes.
The ball was thrown horizontally at 10 meters per sec, and the thrower's arm was 78.4 meters above the base of the cliff.
The two balloons are 150-10 = 140 metres apart. They are travelling towards each other at a speed of 15+20 = 35 metres per minute. 140 m at 35 m/minute takes 140/35 = 4 minutes.
At the end of the first day she is (3 - 2) = 1 meter above the bottom.At the end of the second day she is [ 1 + (3 - 2) ] = 2 meters above the bottom.At the end of the third day, she is [ 2 + (3 - 2) ] = 3 meters above the bottom....At the end of the 28th day she is 28 meters above the bottom, assuming she hasn't starved to death yet.During the 29th day, she is in the process of climbing up 3 meters, when she reaches the top and flops outonto the ground. This happens at some time during the 29th day.
Gravitational potential energy = Mass x gravity x heightTherefore, an object at ground level is 0 meters above the ground, thus having no potential energy.PE = mghm = massg = gravitational accelerationh = height
At the end of the first day she is (3 - 2) = 1 meter above the bottom.At the end of the second day she is [ 1 + (3 - 2) ] = 2 meters above the bottom.At the end of the third day, she is [ 2 + (3 - 2) ] = 3 meters above the bottom....At the end of the 28th day she is 28 meters above the bottom, assuming she hasn't starved to death yet.During the 29th day, she is in the process of climbing up 3 meters, when she reaches the top and flops outonto the ground. This happens at some time during the 29th day.===============================================Another contributor says:The Answer is 28 days not 29. The rabbitt would come out on the 28 day.
We need 1 more piece of information, the size of the window. I will be treating the window as 1 m tall. So the window is 2.5 meters off the throwing plane (the bottom of the window) to 3.5 meters off the throwing plane (top of the window). I am also assuming that the window's height is based on how high it is above the throwing plane of your arm (if that is the height off the ground, we also need to know how tall you are). The rock will hit 2.676 meters above the throwing plane so it will hit the bottom portion of the window (as seeing as the window goes from 2.5 meters to 3.5 meters).
I think a hotel that is floating thousands of meters above ground is bull and run by some wacko
It depends on how heigh the window sill is from the ground. it can be right above it, or far from the floor.
As , s = ut + 1/2 a t2 , since a ball is dropped , the equation is modified as h = ut + 1/2 g t2 Therefore , h = 0 x t + 1/2 x 9.8 x 22 [ u = 0 ,since the ball is at rest] h = 19.6 meters Height of the window = 19.6 meters
A 0.650 kg basketball is dropped out of a window that is 6.46 m above the ground. The ball is caught by a person whose hands are 1.32 m above the ground. How much work is done on the ball by its weight?
7.5 degrees
If a cat that has a mass of 4.50 kilograms sits on a ledge that is 0.800 meters above ground and it jumps down to the ground, it will have a specific amount of kinetic energy just as it reaches the ground. In this instance, the answer would be 35.3J.
The potential energy, expressed in joules, is 196 times its height above ground, expressed in meters.
As , s = ut + 1/2 a t2 , since a ball is dropped , the equation is modified as h = ut + 1/2 g t2 Therefore , h = 0 x t + 1/2 x 9.8 x 22 [ u = 0 ,since the ball is at rest] h = 19.6 meters Height of the window = 19.6 meters
529.2 J
The peak in Rila called Musalla is at 2925 meters above the ground
a couple of hundred meters above sea level (can be less or more)