Question

1.)What force is necessary to give a 1900 kg car an acceleration of 2.5 m/s2?

2.) Find the acceleration produced by a force of 78 N acting on a 6.5 kg object.

3.) What force must be applied to a 1100 kg tractor to give it an acceleration of 2.8 m/s2?

Answer 1

1.) Given Mass=1900 kg  

Acceleration=2.5m/s²

Find force-

Using formula- F=ma

F--> Force , m--->mass and a--->acceleration

F=1900kg×2.5m/s² =4750 kgm/s^{​​​​​​2}

1 kgm/s^{​​​​​​2} = 1Newton(N)

F=4750 N

So, Force=4750 N

2.) Force=78 N and Mass=6.5kg

Find acceleration-

F=ma

a=F/m

a=78N/6.5kg =12 N/kg =(12kgm/s²)/(kg)=12 m/s²

so, Acceleration,a=12m/s²

3.) Mass=1100kg and acceleration=2.8m/s^{​​​​​​2}

F=ma

F=(1100kg)(2.8m/s²)=3080N

So, Force,F=3080 N