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Q. At time t = 0, the hockey puck is sent sliding over a frozen lake, directly into a strong wind. Gives the velocity v of the puck versus time as puck moves along a single axis. (The time axis is marked in increments of 0.25 s.) At t = 2.8 s, what is its position relative to its position x = 0 at t = 0?

Q. A net torque of magnitude 500N m is exerted on the rotor of an electric generator for 25 s.

What is the magnitude of an angular momentum of the rotor at the end of 25 s if it was initially at rest?

Response in units of kg m2/s.

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