Question

What force would be needed to increase a 450 kg object's velocity from 15 m/s to 75 m/s in 1 minute?

Answer 1

Answer:

450N

Explanation:

Given parameters:

Mass of object  = 450kg

Initial velocity  = 15m/s

Final velocity  = 75m/s

Time  = 1min  = 60s

Unknown:

Force applied  = ?

Solution:

To solve this problem, from Newton's second law of motion, we know that;

  Force  = mass x acceleration

  Acceleration  = $\frac{v - u }{t}$

 v is the final velocity

 u is the initial velocity

 t is the time taken

Now;

    Force  = mass x  $\frac{v - u }{t}$

   Force  = 450 x $\frac{75 - 15}{60}$  = 450N