Given the dynamics equations that are used to solve a problem. For each of these, you are to

a. Write a realistic problem for which these are the correct equations.

b. Draw the free-body diagram and the pictorial representation for your problem.

c. Finish the solution of the problem.

1. -0.80n = (1500 kg) a_x

n – (1500 kg) (9.80 m/s²) = 0

2. T - 0.20n – (20 kg) (9.80 m/s²) sin 20­

= (20 kg) (2.0 m/s²)

n – (20 kg) (9.80 m/s²) cos 20­^o = 0

3. (100 N) cos 30­^o - f_k = (20 kg) a_x

n + (100 N) sin 30­^o – (20 kg) (9.80 m/s²) = 0

_fk = 0.20n