Its 1.6 kg
Remember
E = 1/2mv^2 is the kinetic energy of the ball. The energy is given to you so you need to solve for mass. Rearranging the equation gives you 2E/v^2 = 1.6
Answer:
adjust chosen Karl Karl jam halted Bernie
Impulse is (force) x (time).
That's the <em>last choice</em> on the list. It could be 'D', or '4', or 'Δ', or 'ד' etc.
If you play with it for a while, you discover that impulse has the same units as momentum, which certainly gives you something to think about.
