Answer:
a)
b)
c)
d)
Explanation:
Given:
mass of the player,
mass of the ball,
initial velocity of the player,
initial velocity of the ball,
a)
<u>Case:</u> When the player and the ball are moving in the same direction.
where:
total mass after the player catches the ball
v = final velocity of the system
b)
Initial kinetic energy of the system:
Final kinetic energy of the system:
∴Change in kinetic energy
c)
<u>Case:</u> When the player and the ball are moving in the opposite direction.
d)
Final kinetic energy in this case:
∴Change in kinetic energy:
Multiply the air pressure by the area of the tabletop
Answer:
3 laws of planetary motion
Water is another valuable resource. Water is needed to irrigate crops; for drinking, sanitation, and transportation; and also to produce electricity. Many countries in this region are located along swiftly moving rivers. They are able to harness this water to generate electricity. Rivers running down mountains are dammed to produce hydroelectric power.