By conservation of energy...
PE = KE + Thermal Energy
mgh = .5mv2 + TE
(15)(9.8)(2.8) = (.5)(15)(2.3)2 + TE
Thermal Energy = 372 J
A 15.0 kg child descends a slide 2.8m high and reaches the bottom with a speed...
if the child reaches the bottom of the slide with a speed of 7.6m/s what is the kinetic energy at the bottom of the slide? how much energy was lost? where did it go?
At a playground, a 19-kg child plays on a slide that descends a total of 2.3 meters (vertically). The child starts out at rest at the top of the slide. During the child’s descent, friction does -361 J of work on the child. What speed does the child have at the bottom of the slide?
A 18 kg child slides down a 4.0 m-high playground slide. She starts from rest, and her speed at the bottom is 2.8 m/s. What is the change in the thermal energy of the slide and the seat of her pants?
A 29.00-kg child initially at rest slides down a playground slide from a height of 3.10 m above the bottom of the slide. If her speed at the bottom is 2.40 m/s, how much energy is lost due to friction?
30-kg child slides down a playground slide as shown below. At the bottom of the slide, the speed of the child is 1.0 m/s. How many joules of internal energy were gained by the child and slide along the way? 2.5 m 30°
10.you are asked to design a friction-less playground slide such that the speed a child reaches at the bottom does not exceed 19 m/s. determine the maximum height (in meters) that the slide can be.
A 40-kg child slides down a curved slide starting at the top with an initial speed of 4 m/s. (a) Suppose that the slide is frictionless. Determine the speed of the child when she is 3 m below her starting height. (b) Suppose that the slide has friction. Determine the speed of the child when she is 5 m below her starting height if she starts from rest and 300 J of thermal energy is dissipated during the motion.
A child leaves her book bag on a slide. The bag, which is at the top of the slide, starts from rest and reaches the bottom in 1.73 s. The mass of the book bag is 3, 30 kg, the length of the slide is 3.70 m and the angle of incline is 31.oe. (Assume the +x-axis to be parallel to and down the slide. For all values, enter the magnitude only.) With what acceleration does the bag go down...
a 10 kg child slides down a 4 meter long slide at angle of 30 degrees to the horizontal. at the end of the slide , she is going at a speed of 2.2 m/s. how much energy is converted to internal energy by friction during this slide? (answer in joules) Please explain how to solve this so that I could learn for the future. Thank you!!
Suppose a slide similar to Der Stuka is 38.5 meters high, but is a straight slope, inclined at 45.0° with respect to the horizontal. (a) Find the speed of a 55.5-kg woman at the bottom of the slide, assuming no friction. (Enter your answer to at least one decimal place.) ______ m/s (b) If the woman has a speed of 24.4 m/s at the bottom, find the change in mechanical energy due to friction. ______ J (c) Find the magnitude...