Question

2. Determine your weight (e.g., the force of gravity on you).
3. Determine what normal force would be required to accelerate you upwards from ground level at a rate of 2.0 or 3.0 m/s^2 (choose one acceleration value).
4. What would the normal force be if the acceleration described in (3) was directed downwards?

Answer 1

2)

$$W=mg=(80)(9.8)=784\ N$$

3)

$$N=m(a+g)=80(2+9.8)=944\ N$$

4)

$$N=m(-a+g)=80(-2+9.8)=624\ N$$