Question

A mass of 4 lb initially at rest is accelerated by a force of 5n for 4 seconds. determine the acceleration (m/s2)

Answer 1

Given : 
mass=4lb=4pounds=1.8kg
Force=F=5 N
Time=4Sec.
Formula :
F=ma
a=F/M
=5/1.8
=2.77 m/s²
Therefore acceleration is 2.77m/s²

Answer 2

Answer:

Acceleration is 2.7 m/s².

Step-by-step explanation:

Given : A mass of 4 lb initially at rest is accelerated by a force of 5n for 4 seconds.

Determine : The acceleration?

Solution :

Mass = 4 lb

Converting lb into kg,

$kg=\frac{1}{2.2} lb$

$kg=\frac{4}{2.2} lb$

$kg=1.8 lb$

Mass = 1.8 kg

Force F=5 N.

Formula to find acceleration is

$F=m\times a$

$a=\frac{F}{m}$

$a=\frac{5}{1.8}$

$a=2.7m/s^2$

Therefore, Acceleration is 2.7 m/s².