This man served as Commissioner of the Freedmen’s Bureau:  

Q17.  A 50 kg child swinging on a rope swing 2.5 m long. When the child is at the lowest point in the motion, the tension in the rope is 840 N. How fast is the child traveling at this instant?

You will use this problem for Questions 19 & 20. Read carefully! Q19 & 20.  A 5 kg object moving 3 m/s slides onto a rough surface.  Q19:  Find the kinetic energy of the object as it enters the rough surface. Q20:  Find the coefficient of friction,

5. Exercise efficiency is greater in subjects who 

You will use this problem for Questions 10 & 11. Read carefully! Q10 & 11.  A ball is launched straight up with an initial velocity of 30 m/s and falls straight back down.  Q10:  Find the height of the ball after 2 sec. Q11:  Find the velocity of the ball after 4 sec.

The Plains Indians were a serious obstacle to settlement on the last frontier because: 

The Congressional/Military Reconstruction Act of 1867 required, before a state could be readmitted to the Union, that it: 

You will use this problem for Questions 1 & 2. Read carefully! Q1 & 2.  A 12 kg object is placed on an inclined plane as shown. The coefficient of kinetic friction is 0.33.   Q1:  Draw and label a free-body diagram of the object.  Then find the magnitude of the normal force, N. Q2:  Find the acceleration of the object down the plane.

69. Factors contributing to the magnitude of heart rate (HR) and blood pressure (BP) changes with exercise include all of the following EXCEPT

T or F: An increase in the hydrogen ion concentration in contracting skeletal muscle can impair performance by hydrogen ions competing with calcium ions for binding sites on troponin.