Answer:
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Answer: 132.02 J
Explanation:
By definition, the kinetic energy is written as follows:
KE = 1/2 m v²
In our question, we know from the question, the following information:
m = 0.1434 Kg
v= 42.91 m/s
Replacing in the equation for KE, we have:
KE = 1/2 . 0.1434 Kg. (42.91)² m²/s² ⇒ KE = 132.02 N. m = 132.02 J
<h2>
The average force acting on the ball is 58 N upwards.</h2>
Explanation:
Force is given by rate of change of momentum.
Mass of ball = 0.60 kg
Initial velocity = -6.3 m/s downwards
Final velocity = 5.3 m/s upwards
Change in momentum = 0.6 x 5.3 - 0.6 x (-6.3)
Change in momentum = 6.96 kg m/s upwards
Time taken = 0.12 s
Rate of change of momentum = Change in momentum ÷ Time
Rate of change of momentum = 6.96 ÷ 0.12
Rate of change of momentum = 58 N upwards
Force = 58 N upwards
The average force acting on the ball is 58 N upwards.
Its D because of the emission spectra
A visual display of data or information is called a graph. There are many types of graphs. These can include pie graphs, bar graphs, and many more. Graphs are useful, because they show you visually data which is helpful to many. Hope this helped