Answer:
The groups walking speed is
or 
Step-by-step explanation:
we know that
To find the speed divide the distance by the time
so

Convert to mixed number

The force exerted on victim is 20 newton
<em><u>Solution:</u></em>
An attacker swings a board with a mass of 2 kg toward a victim
The acceleration is 10
when the board hits the victim
To find: Force exerted on victim
<em><u>The force is given by formula:</u></em>

From given,

<em><u>Substituting the values in formula,</u></em>

Thus force exerted on victim is 20 newton
Answer:

Step-by-step explanation:

-10s-3=7
Add 3
-10s= 10
Divide by -10
s= -1