Wednesday
December 11, 2013

# Posts by Kristina

Total # Posts: 163

physics
what relationship do you expect between the change in the kinetic energy and the change in the potential energy?

physics
what relationship do you expect between the change in the kinetic energy and the change in the potential energy?

physics
Qualitatively explain how you would expect the potential energy to change as a glider slides down an inclined air track, where friction is negligible.

physics
Qualitatively explain how you would expect the kinetic energy to change as a glider slides down an inclined air track, where friction is negligible.

physics
If you weigh 650 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 15.0 km ? Take the mass of the sun to be ms = 1.99×10^30 kg, the gravitational constant to be G = 6.67×10^−11 Nxm^2...

Physics
How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 85 m at a speed of 95 km/h?

Physics
A 15 kg child stands on the edge of a small merry-go-round of radius 2.0 m. If the merry-go- round turns at a steady rate of 11 rpm, calculate the magnitude and direction of the net force on the child.

Physics
how am i suppose to know what theta is?!?

Physics
In the design of a supermarket, there are to be several ramps connecting different parts of the store. Customers will have to push grocery carts up the ramps and it is obviously desirable that this not be too difficult. The engineer has done a survey and found that almost no o...

Physics
A roller coaster reaches the top of the steepest hill with a speed of 3.0 . It then descends the hill, which is at an average angle of 40 and is 50.0 long. Estimate its speed when it reaches the bottom. Assume kinetic friction (uk) = 0.18 .

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