It depends when you look at a pichture it could possibly help.
Answer:
12m/s
Explanation:
Let's call the velocity that the car maintains for 10 seconds 
, and the final velocity 
.
Hope this helps!
Answer:
Option C
Maximum potential energy is at point R.
Explanation:
Potential energy is a product of mass, acceleration due to gravity and height ie
PE=mgh where PE is the potential energy, m is mass of an object, g is acceleration due to gravity whose value is normally taken as 9.81 and h is height. Since at point R we have the maximum height, the potential energy will be highest at this point.
The answer is magnet away from the coil
