Answer Happy

A 30-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 160 J from 410 J. How high does she rise during this interval? Neglect air resistance.
The skateboarder in the drawing starts down the left side of the ramp with an initial speed of 6.1 m/s. Neglect nonconservative forces, such as friction and air resistance, and find the heighth of the highest point reached by the skateboarder on the right side of the ramp. <> i ✪
Consult Conceptual Example 9 in preparation for this problem. The drawing shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the water. Suppose he enters the water at a speed of 18.3 m/s via path 1. How fast is he moving on path 2 when he releases the rope at a height of 1.33 m above the water? Ignore the effects of air resistance. Path 2 Number Path I Units <>
The drawing shows a skateboarder moving at 5.20 m/s along a horizontal section of a track that is slanted upward by 0 = 53.0⁰ above the horizontal at its end, which is 0.790 m above the ground. When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find the maximum height H to which she rises above the end of the track. Number 5.20m/s i 0.790m Units î