Potential energy is the answer
I think everything looks good but 2 might not be right, it might be B
1/2mv^2
1/2x12x10^2=600J
The kinetic energy is 600J
Answer: Acceleration of the car at time = 10 sec is 108
and velocity of the car at time t = 10 sec is 918.34 m/s.
Explanation:
The expression used will be as follows.


= 


As, 
u = -2900 m/s

= 
= 

Also, we know that
a =
= 
= 
At t = 10 sec,
= 918.34 m/s
and, a = 108 
Answer:8.2 Ω
Explanation:
I ASSUME you mean Ω (ohms) and not W(atts)
Re = 1/(1 / 27 + 1/56 + 1/15) = 8.2263329... ≈ 8.2 Ω