Answer:
True
Explanation:
J. Henry Alston was known as a famous African American psychologist. He was known through his detailed study of the sensations of heat and cold which is a necessity for all humans.
He however became the first African American to publish his research findings on the perception of heat and cold in a major US psychology journal which gave him recognition in his field.
Bicyclist initial kinetic energy is Ek=(1/2)*m*v² where m is his mass and v is his speed and that is equal to:
Ek=(1/2)*60*2²=120 J.
When we add the increased work output, we get the total kinetic energy:
Ek(total)=Ek+W= 120 J + 1800 J= 1920 J
So Ek(total)=1920 J = (1/2)*m*V² where V is the speed after the bicyclist increased his work output. So lets solve for V:
(1/2)*60*V²=1920
30*V²=1920, we divide by 30,
V²=64, and take the square root of both sides,
V=8 m/s.
So the speed of the bicyclist after the increased work output is V=8 m/s.
Force = mass*acceleration so
3.6*2.5 =9 Newtons
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Answer:Zero
Explanation:
Given
mass of ball
If the ball is thrown upward then at maximum point velocity of ball is zero because ball is no longer able to move upward
Momentum(P) of a particle is given by
Therefore at the highest point momentum is zero .