Answer:
The Sun. The heat that eventually causes the earth to warm actually comes from the sun. The sun is a huge ball of gases, mainly hydrogen. Every day, the hydrogen in the sun is converted into helium through millions and millions of chemical reactions.
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The results of the calculation are as follows;
- The runners new speed is 25.7 m/s.
- The height is 50.2 m
- The velocity of the rock is 31.4 m/s.
- The initial velocity is 18.2 m/s
<h3>How do apply kinematics?</h3>
The term kinematics has to do with the study of motion without looking at the cause of motion which is force.
Now let us try to solve the problems;
v = u + at
v = final velocity
u = initial velocity
a = acceleration
t = time
v = 6.5 + (2.4 * 8)
v = 25.7 m/s
b) Given the formula
h = ut + 1/2gt^2
h = height
g = acceleration due to gravity
Thus;
h = 1/2gt^2 (because u = 0 m/s when the object is dropped from a height)
h = 0.5 * 9.8 * (3.2)^2
h = 50.2 m
c) v = u + gt
v = gt
v = 9.8 * 3.2
v = 31.4 m/s
d) v^2 = u^2 - 2gh
Now v = 0 m/s at the maximum height
Thus;
u^2 = 2gh
u = √2gh
u = √2 * 9.8 * 17
u = 18.2 m/s
Learn more about kinematics:brainly.com/question/7590442
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Glass as it is heavier and by newtons first law and inertia the greater the mass = more inertia(resistance to chabge in motion) thus the glass has a greater mass than an empty paper cup and thus has greater inertia. So it would be easier to leave it in place