Here’s my work to your question. If you need clarification feel free to drop something in the comment section.
Hello there!
The answer is the following:
Rapid energy transfer between Potential and Kinetic energy makes roller coasters thrilling.
Potential Energy is the energy related to the vertical position of the roller coaster cart. When it is at the highest point, the Potential Energy is at a maximum.
Kinetic Energy is the energy related to the speed of the roller coaster cart. When the cart is at the highest point, the kinetic energy is at a minimum, but as it begins to go down, the Potential Energy is transformed into Kinetic Energy, making the cart to increase its speed and making it a thrilling experience.
Salutations!
<span>You can see lightning before you can hear the thunder. Which is the best explanation for this?
The best explanation for this statement is the transmission of light in air is faster than the transmission of sound in the air. Light is faster than sound, thus you can see the thunder then you can hear the sound.
Hope I helped :D</span>
Answer:
9.81 N
Explanation:
Given that a baseball weighs 1 kg. The pitcher throws the ball at a velocity of 10 m/s straight up. Neglecting air resistance. The maximum height reached will be calculated by using the formula
V^2 = U^2 - 2gH
U = 10 m/s
g = 9.8m/s^2
At maximum height, V = 0
Substitute u and g into the formula
0 = 10^2 - 2 × 9.8 × H
19.6H = 100
H = 100/19.6
H = 5.1 m
The Kinetic energy on the ball will be
K.E = 1/2mv^2
K.E = 1/2 × 1 × 10^2
K.E = 1/2 × 100
K.E = 50 J
But energy = work done
WD = Force × distance (height)
The force that acts on the baseball when it is HALF WAY to the top of the path will be
F × 5.1/2 = 50
F = 100/5.1
F = 19.61 N
The weight acting downward will be
W = mg
W = 1 × 9.8
W = 9.8 N
The net force acting on the ball will be
Net force = F - W
Net force = 19.61 - 9.8
Net force = 9.81 N
Therefore, the net force that acts on the baseball when it is HALF WAY to the top of the path is 9.81 N
