Que presión ejerce sobre el suelo un vehículo de 800 kg, sabiendo que cada una de sus cuatro ruedas se apoya sobre una superficie de 40 cm2?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

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:

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.