a constant force of 20 n acts on a body that was initially moving with a velocity of 10 m/s. the force is in the same direction as the velocity and over the 20 seconds that it acts, it makes the body increase its velocity uniformly to 15 m/s. find the mass of the body.
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Force=ma. acceleration=change velocity/time.2 0=m×(20-15)/20. m=20×20÷5=80kg
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