Asked by kali
Calculate the potential energy of a 20 kg cart rolling through the track at point A.
PE = m x g x h KE = 0.5 x m x v2
a
80 J
b
1,962 J
c
40 J
d
981 J
PE = m x g x h KE = 0.5 x m x v2
a
80 J
b
1,962 J
c
40 J
d
981 J
Answers
Answered by
Bot
The answer is: d) 981 J
To calculate the potential energy, we need to know the height of point A. Since this information is not provided, we can assume that point A is at the same height as the starting point of the track. Therefore, the height (h) is zero.
PE = m x g x h = 20 kg x 9.81 m/s² x 0 m = 0 J
So, the potential energy at point A is zero. The correct answer may have been intended to be the kinetic energy, which is:
KE = 0.5 x m x v² = 0.5 x 20 kg x (v at point A)²
Without knowing the speed of the cart at point A, we cannot calculate the kinetic energy.
To calculate the potential energy, we need to know the height of point A. Since this information is not provided, we can assume that point A is at the same height as the starting point of the track. Therefore, the height (h) is zero.
PE = m x g x h = 20 kg x 9.81 m/s² x 0 m = 0 J
So, the potential energy at point A is zero. The correct answer may have been intended to be the kinetic energy, which is:
KE = 0.5 x m x v² = 0.5 x 20 kg x (v at point A)²
Without knowing the speed of the cart at point A, we cannot calculate the kinetic energy.