Question

A force of 128 If acts on a mass of 490 g for 10 s.
What velocity will it give to the mass?​

Answer 1

Answer:2.61m/s

Explanation:

Answer 2

Answer:

The velocity which force gives to mass = 2612.2 m/s.

Explanation:

Given:

• Force on the mass, $F=128\ N$.

• Mass, $490\ g =0.49\ kg$.

• Time period in for which the force is applied, $t=10\ s$.

According to the Newton's second law of motion, the force on an object is equal to the mass times times the net acceleration produced in the object, if $a$ is the acceleration of the mass,

$F=ma\\\Rightarrow a = \dfrac Fm = \dfrac {128}{0.49}=261.22\ m/s^2.$

Let the mass be starts from rest, so that its initial velocity is $u=0\ m/s$ and its final velocity which the force give be $v$.

Using the equation of Kinematics,

$v=u+at\\v=0+261.22\times 10=2612.2\ m/s.$