Answer:
given
mass= 3.5 kg
distance covered= 0.4m
inital speed = 1.5 m/sec
final speed = 0 m/sec
To find
net force
solution
formula for force :
[tex] \fbox{f = m.a}[/tex]
In order to find the force we need to find the acceleration.
According to third equation of Kinematics-
[tex] \bold{ {v}^{2} = {u}^{2} + 2as}[/tex]
where,
v= final velocity
u=inital Velocity
a=Acceleration
s=Distance covered
put the value in the above equation
0= (1.5)²+ 2a x 0.4
-2.25= 0.8a
a = -2.25/0.8
a= - 2.8125 m/sec²
now put the value 0f accleration in formula of force
F = m.a
F = 3.5 x - 2.8125
F= -9.84375 N
