contestada

A sailboat is moving across the water at 3.0 m/s. A gust of wind fills its sails and it accelerates at a constant 2.0 m/s2. At the same instant, a motorboat at rest starts its engines and accelerates at 4.0 m/s2. After 3.0 seconds have elapsed, find the velocity of the sailboat.

Respuesta :

Answer:

v = 9 m/s

Explanation:

It is given that,

Initial speed of the sailboat, u = 3 m/s

Acceleration of the sailboat, [tex]a=2\ m/s^2[/tex]

Initial speed of the motorboat, u = 0

Acceleration of the motorboat, [tex]a=4\ m/s^2[/tex]

Time elapsed, t = 3 s

To find,

The velocity of the sailboat

Solve,

Let v is the velocity of the sailboat after 3 seconds. By using the equation of kinematics, it can be calculated.

[tex]v=u+at[/tex]

[tex]v=3\ m/s+2\ m/s^2\times 3\ s[/tex]

v = 9 m/s

Therefore, the velocity of the sailboat is 9 m/s.

Otras preguntas