A person standing at the top of a 7.0 m tall building throws a basketball (m = 0.625 kg) with initial speed v = 4.5 m/s. Ignore air resistance. Take y = 0 at ground level (the bottom of the building). What is the total mechanical energy of the ball immediately after the person throws it (Eg)? 49.2 J 42.9J 44.3 J 6.33 J

A Ferris wheel is a vertical, circular amusement ride with radius, R = 5 m. Riders sit on seats that swivel to remain horizontal. The Ferris wheel rotates so that riders move at a constant speed, v = 5 m/s. Consider a rider whose mass, m = 70 kg. Assume that the acceleration due to gravity, g = 10 m/s₂. H B * L. How much work does the force exerted by the seat do on the rider as they move from point E to point ? O None of these, because the rider's speed does not change O 3500) O-3501 O-3500

5. A 0.50-kg ball is thrown vertically upward with an initial speed of 16.0 m/s. What is the kinetic energy of the ball when it has travelled three-quarters of the distance to its maximum height? J f 60 POISS ƒ60 ⁹ ssf60 f60 ssfe

A student lifts a 2.1-kg physics book to a height of 64 cm and then puts it down to its original position. Assume that the speed of the book remains constant during the entire process. The work done by the student while lifting the book up, W, = Units Select an answer %D The work done by the gravity force while lifting the book up, W2 = Units Select an answer v %3D The work done by the student while putting the book down, W3 = Units Select an answer v %3D The work done by the gravity force while putting the book down, W4 = Units Select an answer v If the book is lifted up in 1.25 seconds, how much power was developed by the student? P = Units Select an answer Y Question Help: Message instructor D Post to forum Submit Question