Impulse or average force when a ball rebounds from a wall, bat or ground

1. A.
   $1:2$
2. B.
   $\sqrt{2}:1$
3. C.
   $1:\sqrt{2}$
4. D.
   $2:1$

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1. A.
   $100\text{ }N$
2. B.
   $200\text{ }N$
3. C.
   $300\text{ }N$
4. D.
   $400\text{ }N$

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1. A.
   $\frac{100mv}{t}$
2. B.
   $200mvt$
3. C.
   $\frac{mv}{100t}$
4. D.
   $\frac{200mv}{t}$

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1. A.
   $4.32\text{ }kg{\text{ }ms}^{- 1}$
2. B.
   $43.2\text{ }kg{\text{ }ms}^{- 1}$
3. C.
   $23.9\text{ }kg{\text{ }ms}^{- 1}$
4. D.
   $2.39\text{ }kg{\text{ }ms}^{- 1}$

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