Kim throws a beach ball up in the air. it reaches its maximum height 0.50\, \text s0.50s0, point, 50, start text, s, end text later. we can ignore air resistance. what was the beachball's velocity at the moment it was tossed into the air?

The beach ball's velocity at the moment it was tossed into the air is 4.9 m/s.

Explanation:

Given:

Time taken by the ball to reach maximum height is,

We know that, velocity of an object at the highest point is always zero. So, final velocity of the ball is,

Also, acceleration acting on the ball is always due to gravity. So, acceleration of the ball is,

The negative sign is used as acceleration is a vector and it acts in the downward direction.

Now, we have the equation of motion relating initial velocity, final velocity, acceleration and time given as:

Where, 'u' is the initial velocity.

Plug in the given values and solve for 'u'. This gives,

Therefore, the beach ball's velocity at the moment it was tossed into the air is 4.9 m/s

powerful computers now, not then

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this