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3 March, 09:54

A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 N. What is the magnitude of the force of the car on the truck?

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  1. 3 March, 10:38
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    The answer is 3000 N.

    Force (F) is the multiplication of mass (m) and acceleration (a).

    F = m · a

    It is given:

    mc = 1000 kg

    mt = 2000 kg

    total force: F = 4500 N

    total mass: m = mc + mt

    Let's calculate acceleration which is common:

    a = F/m = F / (mc + mt) = 4500 / (1000 + 2000) = 4500/3000 = 1.5 m/s²

    Now, when we know acceleration, let's calculate force on the truck:

    Ft = mt · a = 2000 · 1.5 = 3000 N
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