A child of mass 21.7 kg takes a ride on an irregularly curved slide of height 747 m, as in
the figure below. The child starts from rest at
The acceleration of gravity is 9.8 m/s2
the top
10.0 points
ned playground slide begins
section and ends with a circu-
in the figure below,
h
W = mg
-3.9 m
If a frictional force acts on the child, what
is the magnitude of the mechanical energy
dissipated by this force, if the speed of the
child at the bottom is 9.2 m/s!
Answer in units of J.

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

The car hoist allows the car to be driven onto the platform, after which the rear wheels are raised. if the loading from both rear wheels is 1380 lb, determine the force in the hydraulic cylinder ab. neglect the weight of the platform itself. member bcd is a right-angle bell crank pinned to the ramp at c. the force is positive if in tension, negative if in compression.

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?