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

450N

Step-by-step 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 =
`(v - u )/(t)`

v is the final velocity

u is the initial velocity

t is the time taken

Now;

Force = mass x
`(v - u )/(t)`

Force = 450 x
`(75 - 15)/(60)` = 450N