A 1200 kg car is traveling at a velocity of 9.0 m/s North. The driver brakes and the car decelerates to 7.0 m/s North. How much momentum does the car lose?​

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

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:

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?