Question

Determine what is asked. Show all pertinent parts of the solution (GUFSA), make sure to express your answer with correct number of significant figures.

1. Displacement at t = 3s to t = 5s
2. Velocity at t = 6s, considering that the initial velocity is 4m/s

Answer 1

Since there is no equation given, assume the acceleration is 5 m/s².

1. The displacement at 3 and 5 s (starting at 4 m/s):

$$d_3=v_0t_1+\frac{at_1^2}2,\\\space\\ d_5=v_0t_2+\frac{at_2^2}2,\\\space\\ \Delta d=d_5-d_3=77\text{ m}.$$

The velocity is

$$v=v_0+at=34\text{ m/s}.$$