A person on a sled coasts down a hill and then goes over a slight rise with speed 2.7 m/s. The top of this rise can be modeled as a circle of radius 4.1 m. The sled and occupant have a combined mass of 110 kg
If the coefficient of kinetic friction between the snow and the sled is 0.10, what friction force is exerted on the sled by the snow as the sled goes over the top of the rise?
88 N
You might also like to view...
A 20.0 kg box slides down a 12.0 m long incline at an angle of 30.0 degrees with the horizontal. A force of 50.0 N is applied to the box to try to pull it up the incline. The applied force makes an angle of 10.00 degrees to the incline and above the incline. If the incline has a coefficient of kinetic friction of 0.100, then the increase in the kinetic energy of the box is
A. 203 J. B. 275 J. C. 300 J. D. 392 J. E. 425 J.
Which is closest to the average distance between asteroids in the asteroid belt?
A) 1 thousand km B) 10 thousand km C) 100 thousand km D) 1 million km E) 10 million km
A flat circular wire loop lies in a horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the earth's magnetic field points to the north and dips below the horizontal
Which side of the coil tends to lift off of the table due to the magnetic torque on the loop? A) the north side B) the east side C) the south side D) the west side E) The entire loop lifts straight up.
A single slit of width a is illuminated by light of wavelength ?. If a = 4.3?, the maximum number of dark fringes on a semi-circular screen surrounding the slit is
A. 2. B. 4. C. 6. D. 8. E. 9.