6. In which case do you think the overall vertical force your body felt when it hit the ground was greater—when you bent your knees or when you kept them straight? Explain. 7. A large force can make your bones break, damage the discs in your spine, or other unpleasant things. Why do you think you instinctively bend your knees when landing after jumping?

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:

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same

Which missing item would complete this alpha decay reaction ? > 228/88ra + 4/2he a.224/96 rn b. 232/90 th c. 230/92 u d. 235/92 u