Please If a vehicle has a mass of 750 kg
a) What is its weight on earth? Take gravity to be 10 Nkg-1
b) If the gravity on the moon is 1/6th that of the earth, calculate the weight of the car on the moon
c) Given that F = ma, calculate the force needed to move the vehicle with an acceleration of 5ms-2.

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up