If someone could explain how to do #17-20. i have a quiz tomorrow about this you!

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

Which component of the earth’s atmosphere is decreased due to photosynthesis?

If the pressure in a gas is doubled while its volume is held constant. true or false