Question

a truck starts from rest and rools down a hill with a constant acceleration it traveles a distance of 400 m in20 s find its acceleration find the force acting on it if it is mass is 7 tones (hint 1 tone =1000kg​

Answer 1

]Answer

given data,

Initial velocity =u=0

Distance =s=400m

time =t=20sec

a= acceleration

We know that,

Equation of motion:-

s=ut+21at2

400=0+21×a×20×20

400=200a

a=2

acceleration =a=2m/s2

Force =F=?

The force acting on the mass is 7 tonnes(∴1tonne=1000Kg)

Mass m=7×1000=7000Kg

Mass =m=7000kg

Acceleration =a=2m/s2

F=ma

=7000×2

=14000N

Force acting on it is 14000N

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Answer 2

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