Question

calculate the force required to move a car from rest to a velocity of 30m/s in 10sec, given the mass of the car is 1500kg.

Answer 1

Force = mass * acceleration

Acceleration = velocity / time
= (30 / 10) m/s²
= 3 m/s²
Force = (1500* 3) kgm /s²
= 4500 kg *m /s²
= 4500 N
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Answer 2

given,

time=10 sec

final velocity (v)=30m/s

initial velocity(u)=0m/s

mass=1500kg

force= mass *acceleration

acceleration= final velocity - initial velocity/ time= v-u/t

F=m *( v-u) / t

   = 1500 ( 30-0)/10

    = 45000/10= 4500 N

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