Question

A force of 20 N is exerted on an encyclopedia to cause it to accelerate at a rate of 7m/s2. What is the mass of the encyclopedia

Answer 1

Explanation:

m=F/a=20/7=2.8kg

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Answer 2

3 kg

Explanation:

Using Newton's second law of motion,

F=ma

m is the mass of the object in kilograms

a is the acceleration of the object in meters per second squared

And so,

15 N=m⋅5 m/s2

m=15 N5 m/s2

=3 kg

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