When the ball is first thrown, its kinetic energy is highest and its potential energy is lowest. As the ball rises, its kinetic energy decreases and its potential energy increases because it's slowing down as it goes higher. As the ball goes as high as it can, it stops momentarily; that is when the ball's potential energy is full, and it's kinetic energy is low. Then when the ball begins to fall back down, its potential energy is getting lower, and its kinetic energy is growing. Right before the ball hit the ground, the kinetic energy was at its highest, and its potential was lowest. Then when it hit the ground, there was no kinetic or potential energy.
Answer:
A.
B. rev=10.79rev
Explanation:
A.
500rpm
the time is about 2.60s knowing the acceleration is:
so:
B.
The CD stop so the final velocity is vf=0 so:
Total revolutions:
The earth's gravitational acceleration is 9.8 m/s^2, and force = mass * acceleration. Therefore, a bag of sugar weighing 2.2 kg on earth would weigh 2.2 * 9.8 = 21.56 Newtons
If their average velocity is 55 mph Northwest, they won't arrive in Santa Fe.
First of all, the straight-line distance from Houston to Santa Fe is only 740 miles. And if the headed out from Houston going northwest and maintained that heading, then they passed about 135 miles north of Santa Fe.
Let's just work with SPEED, OK ?
If they drove 881 miles at an average speed of 55 mi/hr, then
the trip took them
(881 mi) x (hr / 55 mi) = 16.018 hours (16 hrs 1 min)