In which type of wave are vibrations at right angles to the direction in which the wave is travelling

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Need only answer if you think you know it

Acapacitor is storing energy of 3 joules with a voltage of 50 volts across its terminals. a second identical capacitor of the same value is storing energy of 1 joule. what is the voltage across the terminals of the second capacitor?