A person throws a 0.21 kg ball straight up into the air. It reaches a height of 10 m. What is the force on the ball as it begins to fall? (The acceleration due
to gravity is 9.81 m/s2)
O A. 4.32 N
B. 4.67 N
C. 1.18N
D. 2.06 N

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Part a constants huck finn walks at a speed of 0.60 m/s across his raft (that is, he walks perpendicular to the raft's motion what is huck's velocity (speed and direction) relative to the river bank? express your answer to three significant figures and include the appropriate units. relative to the shore)

Which levels of government establish and implement educational requirements for minors