How Does Mass Affect Acceleration on a Frictionless Surface?

[a18c18]

Homework Statement

A force F0 causes an acceleration of 20 m/s2 when it acts on an object of mass m sliding on a frictionless surface. Find the magnitude of the acceleration of the same object in the circumstances shown in each figure below.

Homework Equations

I cannot figure out how to do this problem without knowing the mass. Can anyone help?

The Attempt at a Solution

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[tiny-tim]

Welcome to PF!

I cannot figure out how to do this problem without knowing the mass. Can anyone help?

Hi a18c18! Welcome to PF!

Hint: Just call the mass m, and do all the equations as usual …

you'll find that you can cancel the m's in the end!