A CRANE LIFTS A WRECKING BALL TO SEVERAL
DIFFERENT HEIGHTS AND ALLOWS IT TO FALL.
A DEVICE IS USED TO MEASURE THE SPEED OF
THE BALL JUST BEFORE IT REACHES THE
GROUND. WHICH SHOWS THAT
LIFTING THE BALL TO A GREATER HEIGHT
TRANSFERS MORE ENERGY TO THE BALL?

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

If steel is more dense that lake water, why can a boat float

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?