What's the kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20 m/s? O A60000 OB 12000 O C.5.680J O D. 2.9400

Which best represents the law of conservation of mass ?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

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: