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Can someone answer the following three physics questions? 1. An object of mass m has acceleration...

Can someone answer the following three physics questions?

1. An object of mass m has acceleration a produced by a force F. (a) How would the force be affected if the mass were doubled and the acceleration was to remain the same? (b) How would the acceleration be affected if the mass were doubled for the same force?

2. A 20.0 kg crate has a force of 50.0 N acting on it is going East. Neglecting friction, what is the acceleration? If another 20.0 kg crate is placed on top of the first, what would then be the acceleration?

3. A 200.0 g block of wood is pushed across a table with an acceleration of 15 cm/s'. What is the magnitude of the net force acting on it?

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