A 1.00 kg laptop is lifted from the ground and placed on a desk. The desktop is 2.2 meters above the ground. How much work is done to lift the laptop? Is this different from the potential energy of the laptop on the desktop?

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

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?