6. A 29.00-kg child initially at rest slides down a playground slide from a height of 2.50 m above the bottom of the slide. If her speed at the bottom is 2.80 m/s, how much energy is lost due to friction?. J
6. A 29.00-kg child initially at rest slides down a playground slide from a height of 2.50 m above the bottom of the slide. If her speed at the bottom is 2.80 m/s, how much energy is lost due to friction?. J
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Transcribed Image Text:6. A 29.00-kg child initially at rest slides down a playground slide from a height of 2.50 m above the bottom of the slide.
If her speed at the bottom is 2.80 m/s, how much energy is lost due to friction?
J
7. A roller coaster reaches the top of the steepest hill with a speed of 6.80 km/h. It then descends the hill, which is at an
average angle of 20° and is 56.0 m long.
that will its speed be when it reaches the bottom? Assume Uk = 0.12.
m/s
has
4.0 m/s. What is the speed of the ball when it 40
8. A 0.56-kg ball is thrown vertically upward with an initial speed of
travelled one-third of the distance to its maximum height?
m/s
Antin464
9. A basketball whose mass is 0.660 kg falls from rest through a height of 4.60 m, and then bounces back. On its way
it, passes by a height of 3.80 m with a speed of 2.05
J
rgy is lost during the bounce?
6 m/s. How much e
146 nu
10. A box of mass 7.60 kg is pulled from rest up a 31.0 m long incline that makes an angle of 20.0° with horizontal. The
coefficient of kinetic friction between the box and the incline is 0.180. At the top of the incline, the speed of the box is
4.20 m/s. What is the work done by the pulling force?
J
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