Answer:
B. 2.6 × 10⁷ J
Explanation:
First let's find the gravitation potential energy due to the height
P.E= m×g×h-------------where m is the mass of cart and passengers, g acceleration due to gravity and h is the height of the vertical ride
P.E= 3.5×10⁴ × 9.8 × 71.6 = 24558800 J
Finding the kinetic due to the final velocity
K.E = 1/2 mv²---------------------where v is velocity that represent how fast the cart was moving before reaching the bottom of the drop
K.E = 1/2 × 3.5×10⁴× 10² = 1750000 J
⇒When the cart starts to ride from rest, the potential energy is converted into kinetic energy which is then converted to thermal energy
Total energy that was converted to heat = 24558800+1750000 = 26308800
=2.6 × 10⁷ J
Answer:
The correct answer is A
Explanation:
I did the test twice and A) 2.3 x 10^7 J was correct.
