1. The force (in Newtons) applied to an object varies jointly as its mass and acceleration. How much force is needed to accelerate a 25 kg object by 3 m/s^2?

Question

2. The potential energy of an object varies jointly as its mass and height from the ground. If the potential energy of an object is 30 J, its mass is 1.5 kg and the height where the object is hanged is 2m. What is the value of the constant of variation?

Answer 1

1. F = m*a = 25 * 3 = 75 N.