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1 vote
Can anyone tell me why I got this wrong?

Two children are fighting over a 2 kg toy. One child pulls right with a 5 N force and another pulls left with a 7.5 N force. How long will it take the toy to reach a speed of 1.0 m/s in this “tug of war”?

my answer = 1.25 s

User Darion
by
6.8k points

1 Answer

2 votes

Answer:

0.8sec

Step-by-step explanation:

Σf= 7.5-5= 2.5 N to the left

Σf=m*a=>2.5=2a=>a=1.25 m/s²

Lets say that the speed is 1m/s

a=speed-0/x=>x=1/1.25=>x=0.8

Hence the time will be 0.8sec

User Miuosh
by
6.6k points