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A little red wagon with mass 7kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of 4m/s and then is pushed 3m in the direction of the initial velocity by a force of 10N. Calculate the wagon's final speed and the acceleration produced by the force.

Given,

Mass of wagon (m)=7kg
Initial Speed (u)=4m/s
Distance (s)=3m
Force (F)=10N
Final Speed (v)=?
Acceleration (a)=?
We have,

F=ma     ⇒    a=107  = 1.43m/s2
Again,
v2=u2+2as=42+21.434=27.44        ⇒       v=5.2m/s
ஃ Final speed is 5.2m/s & Acceleration is 1.43m/s2

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